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Finding the Fourth Proportional to 615,285.40, 923,073.90 and 315,812.20

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Solution

The fourth proportional to 615,285.40, 923,073.90 and 315,812.20 is: 473,793.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,285.40 : 923,073.90 = 315,812.20 : x
  2. Step 2: Convert to fraction form
    615,285.40/923,073.90 = 315,812.20/x
  3. Step 3: Cross multiply
    615,285.40x = 923,073.90 × 315,812.20
  4. Step 4: Simplify right side
    615,285.40x = 291,517,999,121.58
  5. Step 5: Solve for x
    x = 291,517,999,121.58/615,285.40
  6. Step 6: Final answer
    x = 473,793.14

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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.