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Finding the Fourth Proportional to 819,339,905.55, 1,229,009,858.33 and 819,339,905.55

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Solution

The fourth proportional to 819,339,905.55, 1,229,009,858.33 and 819,339,905.55 is: 1,229,009,858.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,339,905.55 : 1,229,009,858.33 = 819,339,905.55 : x
  2. Step 2: Convert to fraction form
    819,339,905.55/1,229,009,858.33 = 819,339,905.55/x
  3. Step 3: Cross multiply
    819,339,905.55x = 1,229,009,858.33 × 819,339,905.55
  4. Step 4: Simplify right side
    819,339,905.55x = 1,006,976,821,240,024,320
  5. Step 5: Solve for x
    x = 1,006,976,821,240,024,320/819,339,905.55
  6. Step 6: Final answer
    x = 1,229,009,858.33

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.