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Finding the Fourth Proportional to 615,086.40, 922,775.40 and 315,613.20

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Solution

The fourth proportional to 615,086.40, 922,775.40 and 315,613.20 is: 473,494.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,086.40 : 922,775.40 = 315,613.20 : x
  2. Step 2: Convert to fraction form
    615,086.40/922,775.40 = 315,613.20/x
  3. Step 3: Cross multiply
    615,086.40x = 922,775.40 × 315,613.20
  4. Step 4: Simplify right side
    615,086.40x = 291,240,096,875.28
  5. Step 5: Solve for x
    x = 291,240,096,875.28/615,086.40
  6. Step 6: Final answer
    x = 473,494.61

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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.