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Finding the Fourth Proportional to 721,886.47, 996,191.24 and 399,589.63

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Solution

The fourth proportional to 721,886.47, 996,191.24 and 399,589.63 is: 551,427.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,886.47 : 996,191.24 = 399,589.63 : x
  2. Step 2: Convert to fraction form
    721,886.47/996,191.24 = 399,589.63/x
  3. Step 3: Cross multiply
    721,886.47x = 996,191.24 × 399,589.63
  4. Step 4: Simplify right side
    721,886.47x = 398,067,689,000.84
  5. Step 5: Solve for x
    x = 398,067,689,000.84/721,886.47
  6. Step 6: Final answer
    x = 551,427.00

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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.