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Finding the Fourth Proportional to 387,446.64, 581,169.96 and 137,953.68

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Solution

The fourth proportional to 387,446.64, 581,169.96 and 137,953.68 is: 206,930.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,446.64 : 581,169.96 = 137,953.68 : x
  2. Step 2: Convert to fraction form
    387,446.64/581,169.96 = 137,953.68/x
  3. Step 3: Cross multiply
    387,446.64x = 581,169.96 × 137,953.68
  4. Step 4: Simplify right side
    387,446.64x = 80,174,534,687.45
  5. Step 5: Solve for x
    x = 80,174,534,687.45/387,446.64
  6. Step 6: Final answer
    x = 206,930.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.