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Finding the Fourth Proportional to 240,357.87, 331,657 and 138,363.61

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Solution

The fourth proportional to 240,357.87, 331,657 and 138,363.61 is: 190,920.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,357.87 : 331,657 = 138,363.61 : x
  2. Step 2: Convert to fraction form
    240,357.87/331,657 = 138,363.61/x
  3. Step 3: Cross multiply
    240,357.87x = 331,657 × 138,363.61
  4. Step 4: Simplify right side
    240,357.87x = 45,889,259,801.77
  5. Step 5: Solve for x
    x = 45,889,259,801.77/240,357.87
  6. Step 6: Final answer
    x = 190,920.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.