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Finding the Fourth Proportional to 615,545.40, 923,318.10 and 172,313.40

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Solution

The fourth proportional to 615,545.40, 923,318.10 and 172,313.40 is: 258,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,545.40 : 923,318.10 = 172,313.40 : x
  2. Step 2: Convert to fraction form
    615,545.40/923,318.10 = 172,313.40/x
  3. Step 3: Cross multiply
    615,545.40x = 923,318.10 × 172,313.40
  4. Step 4: Simplify right side
    615,545.40x = 159,100,081,092.54
  5. Step 5: Solve for x
    x = 159,100,081,092.54/615,545.40
  6. Step 6: Final answer
    x = 258,470.10

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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.