Home / 721,941.20-996,290.60-395,248.70

Finding the Fourth Proportional to 721,941.20, 996,290.60 and 395,248.70

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Solution

The fourth proportional to 721,941.20, 996,290.60 and 395,248.70 is: 545,449.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,941.20 : 996,290.60 = 395,248.70 : x
  2. Step 2: Convert to fraction form
    721,941.20/996,290.60 = 395,248.70/x
  3. Step 3: Cross multiply
    721,941.20x = 996,290.60 × 395,248.70
  4. Step 4: Simplify right side
    721,941.20x = 393,782,557,514.52
  5. Step 5: Solve for x
    x = 393,782,557,514.52/721,941.20
  6. Step 6: Final answer
    x = 545,449.63

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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.