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Finding the Fourth Proportional to 715,373.98, 987,240.33 and 393,095.64

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Solution

The fourth proportional to 715,373.98, 987,240.33 and 393,095.64 is: 542,485.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,373.98 : 987,240.33 = 393,095.64 : x
  2. Step 2: Convert to fraction form
    715,373.98/987,240.33 = 393,095.64/x
  3. Step 3: Cross multiply
    715,373.98x = 987,240.33 × 393,095.64
  4. Step 4: Simplify right side
    715,373.98x = 388,079,869,355.16
  5. Step 5: Solve for x
    x = 388,079,869,355.16/715,373.98
  6. Step 6: Final answer
    x = 542,485.30

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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.