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Finding the Fourth Proportional to 722,176.92, 996,614.64 and 399,886.38

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Solution

The fourth proportional to 722,176.92, 996,614.64 and 399,886.38 is: 551,849.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,176.92 : 996,614.64 = 399,886.38 : x
  2. Step 2: Convert to fraction form
    722,176.92/996,614.64 = 399,886.38/x
  3. Step 3: Cross multiply
    722,176.92x = 996,614.64 × 399,886.38
  4. Step 4: Simplify right side
    722,176.92x = 398,532,620,644.60
  5. Step 5: Solve for x
    x = 398,532,620,644.60/722,176.92
  6. Step 6: Final answer
    x = 551,849.01

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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.