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Finding the Fourth Proportional to 611,687.70, 917,531.55 and 442,851.30

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Solution

The fourth proportional to 611,687.70, 917,531.55 and 442,851.30 is: 664,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,687.70 : 917,531.55 = 442,851.30 : x
  2. Step 2: Convert to fraction form
    611,687.70/917,531.55 = 442,851.30/x
  3. Step 3: Cross multiply
    611,687.70x = 917,531.55 × 442,851.30
  4. Step 4: Simplify right side
    611,687.70x = 406,330,039,708.52
  5. Step 5: Solve for x
    x = 406,330,039,708.52/611,687.70
  6. Step 6: Final answer
    x = 664,276.95

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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.