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Finding the Fourth Proportional to 722,207.62, 996,634.24 and 399,910.80

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Solution

The fourth proportional to 722,207.62, 996,634.24 and 399,910.80 is: 551,870.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,207.62 : 996,634.24 = 399,910.80 : x
  2. Step 2: Convert to fraction form
    722,207.62/996,634.24 = 399,910.80/x
  3. Step 3: Cross multiply
    722,207.62x = 996,634.24 × 399,910.80
  4. Step 4: Simplify right side
    722,207.62x = 398,564,796,225.79
  5. Step 5: Solve for x
    x = 398,564,796,225.79/722,207.62
  6. Step 6: Final answer
    x = 551,870.11

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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.