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Finding the Fourth Proportional to 721,963.34, 996,277.10 and 399,650.66

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Solution

The fourth proportional to 721,963.34, 996,277.10 and 399,650.66 is: 551,500.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,963.34 : 996,277.10 = 399,650.66 : x
  2. Step 2: Convert to fraction form
    721,963.34/996,277.10 = 399,650.66/x
  3. Step 3: Cross multiply
    721,963.34x = 996,277.10 × 399,650.66
  4. Step 4: Simplify right side
    721,963.34x = 398,162,800,557.89
  5. Step 5: Solve for x
    x = 398,162,800,557.89/721,963.34
  6. Step 6: Final answer
    x = 551,500.03

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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.