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Finding the Fourth Proportional to 391,939.66, 540,861.42 and 222,170.14

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Solution

The fourth proportional to 391,939.66, 540,861.42 and 222,170.14 is: 306,586.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,939.66 : 540,861.42 = 222,170.14 : x
  2. Step 2: Convert to fraction form
    391,939.66/540,861.42 = 222,170.14/x
  3. Step 3: Cross multiply
    391,939.66x = 540,861.42 × 222,170.14
  4. Step 4: Simplify right side
    391,939.66x = 120,163,257,402.00
  5. Step 5: Solve for x
    x = 120,163,257,402.00/391,939.66
  6. Step 6: Final answer
    x = 306,586.11

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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.