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Finding the Fourth Proportional to 715,737.33, 987,718.64 and 393,449.49

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Solution

The fourth proportional to 715,737.33, 987,718.64 and 393,449.49 is: 542,960.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,737.33 : 987,718.64 = 393,449.49 : x
  2. Step 2: Convert to fraction form
    715,737.33/987,718.64 = 393,449.49/x
  3. Step 3: Cross multiply
    715,737.33x = 987,718.64 × 393,449.49
  4. Step 4: Simplify right side
    715,737.33x = 388,617,393,204.25
  5. Step 5: Solve for x
    x = 388,617,393,204.25/715,737.33
  6. Step 6: Final answer
    x = 542,960.91

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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.