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Finding the Fourth Proportional to 386,611.20, 580,062.60 and 187,108.20

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Solution

The fourth proportional to 386,611.20, 580,062.60 and 187,108.20 is: 280,732.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,611.20 : 580,062.60 = 187,108.20 : x
  2. Step 2: Convert to fraction form
    386,611.20/580,062.60 = 187,108.20/x
  3. Step 3: Cross multiply
    386,611.20x = 580,062.60 × 187,108.20
  4. Step 4: Simplify right side
    386,611.20x = 108,534,468,973.32
  5. Step 5: Solve for x
    x = 108,534,468,973.32/386,611.20
  6. Step 6: Final answer
    x = 280,732.86

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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.