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Finding the Fourth Proportional to 391,898.91, 540,862.79 and 222,114.81

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Solution

The fourth proportional to 391,898.91, 540,862.79 and 222,114.81 is: 306,542.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,898.91 : 540,862.79 = 222,114.81 : x
  2. Step 2: Convert to fraction form
    391,898.91/540,862.79 = 222,114.81/x
  3. Step 3: Cross multiply
    391,898.91x = 540,862.79 × 222,114.81
  4. Step 4: Simplify right side
    391,898.91x = 120,133,635,836.92
  5. Step 5: Solve for x
    x = 120,133,635,836.92/391,898.91
  6. Step 6: Final answer
    x = 306,542.41

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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.