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Finding the Fourth Proportional to 387,265.88, 580,483.51 and 187,311.20

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Solution

The fourth proportional to 387,265.88, 580,483.51 and 187,311.20 is: 280,765.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,265.88 : 580,483.51 = 187,311.20 : x
  2. Step 2: Convert to fraction form
    387,265.88/580,483.51 = 187,311.20/x
  3. Step 3: Cross multiply
    387,265.88x = 580,483.51 × 187,311.20
  4. Step 4: Simplify right side
    387,265.88x = 108,731,062,838.31
  5. Step 5: Solve for x
    x = 108,731,062,838.31/387,265.88
  6. Step 6: Final answer
    x = 280,765.92

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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.