Home / 718,756.38-991,939.50-396,494.64

Finding the Fourth Proportional to 718,756.38, 991,939.50 and 396,494.64

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Solution

The fourth proportional to 718,756.38, 991,939.50 and 396,494.64 is: 547,193.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,756.38 : 991,939.50 = 396,494.64 : x
  2. Step 2: Convert to fraction form
    718,756.38/991,939.50 = 396,494.64/x
  3. Step 3: Cross multiply
    718,756.38x = 991,939.50 × 396,494.64
  4. Step 4: Simplify right side
    718,756.38x = 393,298,694,954.28
  5. Step 5: Solve for x
    x = 393,298,694,954.28/718,756.38
  6. Step 6: Final answer
    x = 547,193.33

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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.