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Finding the Fourth Proportional to 715,375.48, 987,242.40 and 393,097.14

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Solution

The fourth proportional to 715,375.48, 987,242.40 and 393,097.14 is: 542,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,375.48 : 987,242.40 = 393,097.14 : x
  2. Step 2: Convert to fraction form
    715,375.48/987,242.40 = 393,097.14/x
  3. Step 3: Cross multiply
    715,375.48x = 987,242.40 × 393,097.14
  4. Step 4: Simplify right side
    715,375.48x = 388,082,163,926.74
  5. Step 5: Solve for x
    x = 388,082,163,926.74/715,375.48
  6. Step 6: Final answer
    x = 542,487.37

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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.