Home / 715,588.43-987,514.18-393,331.55

Finding the Fourth Proportional to 715,588.43, 987,514.18 and 393,331.55

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Solution

The fourth proportional to 715,588.43, 987,514.18 and 393,331.55 is: 542,798.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,588.43 : 987,514.18 = 393,331.55 : x
  2. Step 2: Convert to fraction form
    715,588.43/987,514.18 = 393,331.55/x
  3. Step 3: Cross multiply
    715,588.43x = 987,514.18 × 393,331.55
  4. Step 4: Simplify right side
    715,588.43x = 388,420,477,145.48
  5. Step 5: Solve for x
    x = 388,420,477,145.48/715,588.43
  6. Step 6: Final answer
    x = 542,798.71

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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.