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Finding the Fourth Proportional to 722,166.92, 996,600.84 and 399,876.40

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Solution

The fourth proportional to 722,166.92, 996,600.84 and 399,876.40 is: 551,835.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,166.92 : 996,600.84 = 399,876.40 : x
  2. Step 2: Convert to fraction form
    722,166.92/996,600.84 = 399,876.40/x
  3. Step 3: Cross multiply
    722,166.92x = 996,600.84 × 399,876.40
  4. Step 4: Simplify right side
    722,166.92x = 398,517,156,136.18
  5. Step 5: Solve for x
    x = 398,517,156,136.18/722,166.92
  6. Step 6: Final answer
    x = 551,835.24

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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.