Home / 721,938.52-996,263.22-399,641.80

Finding the Fourth Proportional to 721,938.52, 996,263.22 and 399,641.80

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Solution

The fourth proportional to 721,938.52, 996,263.22 and 399,641.80 is: 551,499.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,938.52 : 996,263.22 = 399,641.80 : x
  2. Step 2: Convert to fraction form
    721,938.52/996,263.22 = 399,641.80/x
  3. Step 3: Cross multiply
    721,938.52x = 996,263.22 × 399,641.80
  4. Step 4: Simplify right side
    721,938.52x = 398,148,426,514.60
  5. Step 5: Solve for x
    x = 398,148,426,514.60/721,938.52
  6. Step 6: Final answer
    x = 551,499.08

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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.