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Finding the Fourth Proportional to 715,025.54, 986,760.42 and 392,765.42

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Solution

The fourth proportional to 715,025.54, 986,760.42 and 392,765.42 is: 542,030.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,025.54 : 986,760.42 = 392,765.42 : x
  2. Step 2: Convert to fraction form
    715,025.54/986,760.42 = 392,765.42/x
  3. Step 3: Cross multiply
    715,025.54x = 986,760.42 × 392,765.42
  4. Step 4: Simplify right side
    715,025.54x = 387,565,370,800.68
  5. Step 5: Solve for x
    x = 387,565,370,800.68/715,025.54
  6. Step 6: Final answer
    x = 542,030.11

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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.