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Finding the Fourth Proportional to 715,591.94, 987,523.04 and 393,309.54

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Solution

The fourth proportional to 715,591.94, 987,523.04 and 393,309.54 is: 542,770.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,591.94 : 987,523.04 = 393,309.54 : x
  2. Step 2: Convert to fraction form
    715,591.94/987,523.04 = 393,309.54/x
  3. Step 3: Cross multiply
    715,591.94x = 987,523.04 × 393,309.54
  4. Step 4: Simplify right side
    715,591.94x = 388,402,233,585.08
  5. Step 5: Solve for x
    x = 388,402,233,585.08/715,591.94
  6. Step 6: Final answer
    x = 542,770.56

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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.