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Finding the Fourth Proportional to 721,813.32, 996,076.98 and 399,524.04

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Solution

The fourth proportional to 721,813.32, 996,076.98 and 399,524.04 is: 551,329.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,813.32 : 996,076.98 = 399,524.04 : x
  2. Step 2: Convert to fraction form
    721,813.32/996,076.98 = 399,524.04/x
  3. Step 3: Cross multiply
    721,813.32x = 996,076.98 × 399,524.04
  4. Step 4: Simplify right side
    721,813.32x = 397,956,699,200.60
  5. Step 5: Solve for x
    x = 397,956,699,200.60/721,813.32
  6. Step 6: Final answer
    x = 551,329.12

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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.