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Finding the Fourth Proportional to 387,542.52, 534,857.85 and 217,776.51

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Solution

The fourth proportional to 387,542.52, 534,857.85 and 217,776.51 is: 300,559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,542.52 : 534,857.85 = 217,776.51 : x
  2. Step 2: Convert to fraction form
    387,542.52/534,857.85 = 217,776.51/x
  3. Step 3: Cross multiply
    387,542.52x = 534,857.85 × 217,776.51
  4. Step 4: Simplify right side
    387,542.52x = 116,479,475,919.10
  5. Step 5: Solve for x
    x = 116,479,475,919.10/387,542.52
  6. Step 6: Final answer
    x = 300,559.22

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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.