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Finding the Fourth Proportional to 715,548.90, 987,481.16 and 393,270.42

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Solution

The fourth proportional to 715,548.90, 987,481.16 and 393,270.42 is: 542,726.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,548.90 : 987,481.16 = 393,270.42 : x
  2. Step 2: Convert to fraction form
    715,548.90/987,481.16 = 393,270.42/x
  3. Step 3: Cross multiply
    715,548.90x = 987,481.16 × 393,270.42
  4. Step 4: Simplify right side
    715,548.90x = 388,347,130,535.29
  5. Step 5: Solve for x
    x = 388,347,130,535.29/715,548.90
  6. Step 6: Final answer
    x = 542,726.19

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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.