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Finding the Fourth Proportional to 387,086.46, 534,188.79 and 217,316.22

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Solution

The fourth proportional to 387,086.46, 534,188.79 and 217,316.22 is: 299,901.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,086.46 : 534,188.79 = 217,316.22 : x
  2. Step 2: Convert to fraction form
    387,086.46/534,188.79 = 217,316.22/x
  3. Step 3: Cross multiply
    387,086.46x = 534,188.79 × 217,316.22
  4. Step 4: Simplify right side
    387,086.46x = 116,087,888,609.17
  5. Step 5: Solve for x
    x = 116,087,888,609.17/387,086.46
  6. Step 6: Final answer
    x = 299,901.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.