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Finding the Fourth Proportional to 721,925.52, 996,245.16 and 399,628.80

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Solution

The fourth proportional to 721,925.52, 996,245.16 and 399,628.80 is: 551,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,925.52 : 996,245.16 = 399,628.80 : x
  2. Step 2: Convert to fraction form
    721,925.52/996,245.16 = 399,628.80/x
  3. Step 3: Cross multiply
    721,925.52x = 996,245.16 × 399,628.80
  4. Step 4: Simplify right side
    721,925.52x = 398,128,257,796.61
  5. Step 5: Solve for x
    x = 398,128,257,796.61/721,925.52
  6. Step 6: Final answer
    x = 551,481.07

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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.