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Finding the Fourth Proportional to 660,451.38, 990,686.18 and 187,136.28

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Solution

The fourth proportional to 660,451.38, 990,686.18 and 187,136.28 is: 280,707.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,451.38 : 990,686.18 = 187,136.28 : x
  2. Step 2: Convert to fraction form
    660,451.38/990,686.18 = 187,136.28/x
  3. Step 3: Cross multiply
    660,451.38x = 990,686.18 × 187,136.28
  4. Step 4: Simplify right side
    660,451.38x = 185,393,326,372.61
  5. Step 5: Solve for x
    x = 185,393,326,372.61/660,451.38
  6. Step 6: Final answer
    x = 280,707.00

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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.