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Finding the Fourth Proportional to 722,166.42, 996,600.15 and 399,875.90

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Solution

The fourth proportional to 722,166.42, 996,600.15 and 399,875.90 is: 551,834.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,166.42 : 996,600.15 = 399,875.90 : x
  2. Step 2: Convert to fraction form
    722,166.42/996,600.15 = 399,875.90/x
  3. Step 3: Cross multiply
    722,166.42x = 996,600.15 × 399,875.90
  4. Step 4: Simplify right side
    722,166.42x = 398,516,381,921.39
  5. Step 5: Solve for x
    x = 398,516,381,921.39/722,166.42
  6. Step 6: Final answer
    x = 551,834.55

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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.