Home / 715,260.42-987,066.06-392,977.20

Finding the Fourth Proportional to 715,260.42, 987,066.06 and 392,977.20

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Solution

The fourth proportional to 715,260.42, 987,066.06 and 392,977.20 is: 542,312.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,260.42 : 987,066.06 = 392,977.20 : x
  2. Step 2: Convert to fraction form
    715,260.42/987,066.06 = 392,977.20/x
  3. Step 3: Cross multiply
    715,260.42x = 987,066.06 × 392,977.20
  4. Step 4: Simplify right side
    715,260.42x = 387,894,456,473.83
  5. Step 5: Solve for x
    x = 387,894,456,473.83/715,260.42
  6. Step 6: Final answer
    x = 542,312.21

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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.