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Finding the Fourth Proportional to 387,469.32, 534,687.08 and 217,692.50

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Solution

The fourth proportional to 387,469.32, 534,687.08 and 217,692.50 is: 300,404.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,469.32 : 534,687.08 = 217,692.50 : x
  2. Step 2: Convert to fraction form
    387,469.32/534,687.08 = 217,692.50/x
  3. Step 3: Cross multiply
    387,469.32x = 534,687.08 × 217,692.50
  4. Step 4: Simplify right side
    387,469.32x = 116,397,367,162.90
  5. Step 5: Solve for x
    x = 116,397,367,162.90/387,469.32
  6. Step 6: Final answer
    x = 300,404.09

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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.