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Finding the Fourth Proportional to 715,737.67, 987,730.30 and 393,461.35

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Solution

The fourth proportional to 715,737.67, 987,730.30 and 393,461.35 is: 542,983.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,737.67 : 987,730.30 = 393,461.35 : x
  2. Step 2: Convert to fraction form
    715,737.67/987,730.30 = 393,461.35/x
  3. Step 3: Cross multiply
    715,737.67x = 987,730.30 × 393,461.35
  4. Step 4: Simplify right side
    715,737.67x = 388,633,695,296.41
  5. Step 5: Solve for x
    x = 388,633,695,296.41/715,737.67
  6. Step 6: Final answer
    x = 542,983.43

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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.