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Finding the Fourth Proportional to 715,575.06, 987,451.80 and 393,285.39

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Solution

The fourth proportional to 715,575.06, 987,451.80 and 393,285.39 is: 542,710.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,575.06 : 987,451.80 = 393,285.39 : x
  2. Step 2: Convert to fraction form
    715,575.06/987,451.80 = 393,285.39/x
  3. Step 3: Cross multiply
    715,575.06x = 987,451.80 × 393,285.39
  4. Step 4: Simplify right side
    715,575.06x = 388,350,366,269.20
  5. Step 5: Solve for x
    x = 388,350,366,269.20/715,575.06
  6. Step 6: Final answer
    x = 542,710.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.