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Finding the Fourth Proportional to 404,735.78, 606,439.08 and 138,350.90

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Solution

The fourth proportional to 404,735.78, 606,439.08 and 138,350.90 is: 207,299.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,735.78 : 606,439.08 = 138,350.90 : x
  2. Step 2: Convert to fraction form
    404,735.78/606,439.08 = 138,350.90/x
  3. Step 3: Cross multiply
    404,735.78x = 606,439.08 × 138,350.90
  4. Step 4: Simplify right side
    404,735.78x = 83,901,392,513.17
  5. Step 5: Solve for x
    x = 83,901,392,513.17/404,735.78
  6. Step 6: Final answer
    x = 207,299.17

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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.