Home / 721,919.52-996,236.88-399,622.80

Finding the Fourth Proportional to 721,919.52, 996,236.88 and 399,622.80

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Solution

The fourth proportional to 721,919.52, 996,236.88 and 399,622.80 is: 551,472.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,919.52 : 996,236.88 = 399,622.80 : x
  2. Step 2: Convert to fraction form
    721,919.52/996,236.88 = 399,622.80/x
  3. Step 3: Cross multiply
    721,919.52x = 996,236.88 × 399,622.80
  4. Step 4: Simplify right side
    721,919.52x = 398,118,971,448.86
  5. Step 5: Solve for x
    x = 398,118,971,448.86/721,919.52
  6. Step 6: Final answer
    x = 551,472.79

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Double scale
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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.