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Finding the Fourth Proportional to 404,429.80, 606,644.70 and 138,126.10

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Solution

The fourth proportional to 404,429.80, 606,644.70 and 138,126.10 is: 207,189.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,429.80 : 606,644.70 = 138,126.10 : x
  2. Step 2: Convert to fraction form
    404,429.80/606,644.70 = 138,126.10/x
  3. Step 3: Cross multiply
    404,429.80x = 606,644.70 × 138,126.10
  4. Step 4: Simplify right side
    404,429.80x = 83,793,466,496.67
  5. Step 5: Solve for x
    x = 83,793,466,496.67/404,429.80
  6. Step 6: Final answer
    x = 207,189.15

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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.