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Finding the Fourth Proportional to 275,139.80, 412,320.90 and 169,645.40

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Solution

The fourth proportional to 275,139.80, 412,320.90 and 169,645.40 is: 254,228.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,139.80 : 412,320.90 = 169,645.40 : x
  2. Step 2: Convert to fraction form
    275,139.80/412,320.90 = 169,645.40/x
  3. Step 3: Cross multiply
    275,139.80x = 412,320.90 × 169,645.40
  4. Step 4: Simplify right side
    275,139.80x = 69,948,344,008.86
  5. Step 5: Solve for x
    x = 69,948,344,008.86/275,139.80
  6. Step 6: Final answer
    x = 254,228.37

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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.