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Finding the Fourth Proportional to 404,266.10, 606,399.15 and 137,986.70

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Solution

The fourth proportional to 404,266.10, 606,399.15 and 137,986.70 is: 206,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,266.10 : 606,399.15 = 137,986.70 : x
  2. Step 2: Convert to fraction form
    404,266.10/606,399.15 = 137,986.70/x
  3. Step 3: Cross multiply
    404,266.10x = 606,399.15 × 137,986.70
  4. Step 4: Simplify right side
    404,266.10x = 83,675,017,591.31
  5. Step 5: Solve for x
    x = 83,675,017,591.31/404,266.10
  6. Step 6: Final answer
    x = 206,980.05

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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.