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Finding the Fourth Proportional to 715,201.42, 986,978.34 and 392,932.26

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Solution

The fourth proportional to 715,201.42, 986,978.34 and 392,932.26 is: 542,246.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,201.42 : 986,978.34 = 392,932.26 : x
  2. Step 2: Convert to fraction form
    715,201.42/986,978.34 = 392,932.26/x
  3. Step 3: Cross multiply
    715,201.42x = 986,978.34 × 392,932.26
  4. Step 4: Simplify right side
    715,201.42x = 387,815,629,707.25
  5. Step 5: Solve for x
    x = 387,815,629,707.25/715,201.42
  6. Step 6: Final answer
    x = 542,246.73

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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.