Home / 718,429.26-991,381.68-396,132.50

Finding the Fourth Proportional to 718,429.26, 991,381.68 and 396,132.50

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Solution

The fourth proportional to 718,429.26, 991,381.68 and 396,132.50 is: 546,634.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,429.26 : 991,381.68 = 396,132.50 : x
  2. Step 2: Convert to fraction form
    718,429.26/991,381.68 = 396,132.50/x
  3. Step 3: Cross multiply
    718,429.26x = 991,381.68 × 396,132.50
  4. Step 4: Simplify right side
    718,429.26x = 392,718,498,395.69
  5. Step 5: Solve for x
    x = 392,718,498,395.69/718,429.26
  6. Step 6: Final answer
    x = 546,634.89

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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.