Home / 715,116.72-986,867.28-392,833.20

Finding the Fourth Proportional to 715,116.72, 986,867.28 and 392,833.20

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Solution

The fourth proportional to 715,116.72, 986,867.28 and 392,833.20 is: 542,113.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,116.72 : 986,867.28 = 392,833.20 : x
  2. Step 2: Convert to fraction form
    715,116.72/986,867.28 = 392,833.20/x
  3. Step 3: Cross multiply
    715,116.72x = 986,867.28 × 392,833.20
  4. Step 4: Simplify right side
    715,116.72x = 387,674,231,577.70
  5. Step 5: Solve for x
    x = 387,674,231,577.70/715,116.72
  6. Step 6: Final answer
    x = 542,113.23

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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.