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Finding the Fourth Proportional to 387,687.06, 534,998.52 and 217,932.12

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Solution

The fourth proportional to 387,687.06, 534,998.52 and 217,932.12 is: 300,740.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,687.06 : 534,998.52 = 217,932.12 : x
  2. Step 2: Convert to fraction form
    387,687.06/534,998.52 = 217,932.12/x
  3. Step 3: Cross multiply
    387,687.06x = 534,998.52 × 217,932.12
  4. Step 4: Simplify right side
    387,687.06x = 116,593,361,660.46
  5. Step 5: Solve for x
    x = 116,593,361,660.46/387,687.06
  6. Step 6: Final answer
    x = 300,740.92

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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.