Home / 715,719.24-987,704.82-393,442.92

Finding the Fourth Proportional to 715,719.24, 987,704.82 and 393,442.92

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Solution

The fourth proportional to 715,719.24, 987,704.82 and 393,442.92 is: 542,957.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,719.24 : 987,704.82 = 393,442.92 : x
  2. Step 2: Convert to fraction form
    715,719.24/987,704.82 = 393,442.92/x
  3. Step 3: Cross multiply
    715,719.24x = 987,704.82 × 393,442.92
  4. Step 4: Simplify right side
    715,719.24x = 388,605,468,478.87
  5. Step 5: Solve for x
    x = 388,605,468,478.87/715,719.24
  6. Step 6: Final answer
    x = 542,957.97

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1.5x scale

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.