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Finding the Fourth Proportional to 387,520.76, 580,739.82 and 187,788.14

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Solution

The fourth proportional to 387,520.76, 580,739.82 and 187,788.14 is: 281,419.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,520.76 : 580,739.82 = 187,788.14 : x
  2. Step 2: Convert to fraction form
    387,520.76/580,739.82 = 187,788.14/x
  3. Step 3: Cross multiply
    387,520.76x = 580,739.82 × 187,788.14
  4. Step 4: Simplify right side
    387,520.76x = 109,056,050,621.74
  5. Step 5: Solve for x
    x = 109,056,050,621.74/387,520.76
  6. Step 6: Final answer
    x = 281,419.89

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1.5x scale

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.