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Finding the Fourth Proportional to 387,294.70, 534,516.80 and 217,528.82

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Solution

The fourth proportional to 387,294.70, 534,516.80 and 217,528.82 is: 300,217.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,294.70 : 534,516.80 = 217,528.82 : x
  2. Step 2: Convert to fraction form
    387,294.70/534,516.80 = 217,528.82/x
  3. Step 3: Cross multiply
    387,294.70x = 534,516.80 × 217,528.82
  4. Step 4: Simplify right side
    387,294.70x = 116,272,808,774.18
  5. Step 5: Solve for x
    x = 116,272,808,774.18/387,294.70
  6. Step 6: Final answer
    x = 300,217.92

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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.