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Finding the Fourth Proportional to 721,881.88, 996,184.89 and 399,585.04

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Solution

The fourth proportional to 721,881.88, 996,184.89 and 399,585.04 is: 551,420.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,881.88 : 996,184.89 = 399,585.04 : x
  2. Step 2: Convert to fraction form
    721,881.88/996,184.89 = 399,585.04/x
  3. Step 3: Cross multiply
    721,881.88x = 996,184.89 × 399,585.04
  4. Step 4: Simplify right side
    721,881.88x = 398,060,576,627.58
  5. Step 5: Solve for x
    x = 398,060,576,627.58/721,881.88
  6. Step 6: Final answer
    x = 551,420.65

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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.