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Finding the Fourth Proportional to 391,995.60, 540,957.24 and 222,232.56

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Solution

The fourth proportional to 391,995.60, 540,957.24 and 222,232.56 is: 306,682.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,995.60 : 540,957.24 = 222,232.56 : x
  2. Step 2: Convert to fraction form
    391,995.60/540,957.24 = 222,232.56/x
  3. Step 3: Cross multiply
    391,995.60x = 540,957.24 × 222,232.56
  4. Step 4: Simplify right side
    391,995.60x = 120,218,312,295.73
  5. Step 5: Solve for x
    x = 120,218,312,295.73/391,995.60
  6. Step 6: Final answer
    x = 306,682.81

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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.