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Finding the Fourth Proportional to 819,004.20, 1,228,506.30 and 606,427.80

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Solution

The fourth proportional to 819,004.20, 1,228,506.30 and 606,427.80 is: 909,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,004.20 : 1,228,506.30 = 606,427.80 : x
  2. Step 2: Convert to fraction form
    819,004.20/1,228,506.30 = 606,427.80/x
  3. Step 3: Cross multiply
    819,004.20x = 1,228,506.30 × 606,427.80
  4. Step 4: Simplify right side
    819,004.20x = 745,000,372,795.14
  5. Step 5: Solve for x
    x = 745,000,372,795.14/819,004.20
  6. Step 6: Final answer
    x = 909,641.70

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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.