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Finding the Fourth Proportional to 404,902.89, 606,687.91 and 138,517.79

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Solution

The fourth proportional to 404,902.89, 606,687.91 and 138,517.79 is: 207,548.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,902.89 : 606,687.91 = 138,517.79 : x
  2. Step 2: Convert to fraction form
    404,902.89/606,687.91 = 138,517.79/x
  3. Step 3: Cross multiply
    404,902.89x = 606,687.91 × 138,517.79
  4. Step 4: Simplify right side
    404,902.89x = 84,037,065,133.18
  5. Step 5: Solve for x
    x = 84,037,065,133.18/404,902.89
  6. Step 6: Final answer
    x = 207,548.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.