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Finding the Fourth Proportional to 819,641.40, 1,230,383.70 and 633,478.20

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Solution

The fourth proportional to 819,641.40, 1,230,383.70 and 633,478.20 is: 950,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,641.40 : 1,230,383.70 = 633,478.20 : x
  2. Step 2: Convert to fraction form
    819,641.40/1,230,383.70 = 633,478.20/x
  3. Step 3: Cross multiply
    819,641.40x = 1,230,383.70 × 633,478.20
  4. Step 4: Simplify right side
    819,641.40x = 779,421,251,585.34
  5. Step 5: Solve for x
    x = 779,421,251,585.34/819,641.40
  6. Step 6: Final answer
    x = 950,929.58

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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.