Home / 715,757.65-987,726.05-393,467.83

Finding the Fourth Proportional to 715,757.65, 987,726.05 and 393,467.83

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Solution

The fourth proportional to 715,757.65, 987,726.05 and 393,467.83 is: 542,974.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,757.65 : 987,726.05 = 393,467.83 : x
  2. Step 2: Convert to fraction form
    715,757.65/987,726.05 = 393,467.83/x
  3. Step 3: Cross multiply
    715,757.65x = 987,726.05 × 393,467.83
  4. Step 4: Simplify right side
    715,757.65x = 388,638,422,566.82
  5. Step 5: Solve for x
    x = 388,638,422,566.82/715,757.65
  6. Step 6: Final answer
    x = 542,974.88

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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.