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Finding the Fourth Proportional to 718,704.96, 991,817.52 and 396,423.76

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Solution

The fourth proportional to 718,704.96, 991,817.52 and 396,423.76 is: 547,067.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,704.96 : 991,817.52 = 396,423.76 : x
  2. Step 2: Convert to fraction form
    718,704.96/991,817.52 = 396,423.76/x
  3. Step 3: Cross multiply
    718,704.96x = 991,817.52 × 396,423.76
  4. Step 4: Simplify right side
    718,704.96x = 393,180,030,512.28
  5. Step 5: Solve for x
    x = 393,180,030,512.28/718,704.96
  6. Step 6: Final answer
    x = 547,067.37

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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.