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Finding the Fourth Proportional to 387,262.72, 580,478.77 and 187,308.04

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Solution

The fourth proportional to 387,262.72, 580,478.77 and 187,308.04 is: 280,761.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,262.72 : 580,478.77 = 187,308.04 : x
  2. Step 2: Convert to fraction form
    387,262.72/580,478.77 = 187,308.04/x
  3. Step 3: Cross multiply
    387,262.72x = 580,478.77 × 187,308.04
  4. Step 4: Simplify right side
    387,262.72x = 108,728,340,670.31
  5. Step 5: Solve for x
    x = 108,728,340,670.31/387,262.72
  6. Step 6: Final answer
    x = 280,761.19

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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.