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Finding the Fourth Proportional to 398,768.68, 550,278.79 and 226,662.72

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Solution

The fourth proportional to 398,768.68, 550,278.79 and 226,662.72 is: 312,782.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,768.68 : 550,278.79 = 226,662.72 : x
  2. Step 2: Convert to fraction form
    398,768.68/550,278.79 = 226,662.72/x
  3. Step 3: Cross multiply
    398,768.68x = 550,278.79 × 226,662.72
  4. Step 4: Simplify right side
    398,768.68x = 124,727,687,299.71
  5. Step 5: Solve for x
    x = 124,727,687,299.71/398,768.68
  6. Step 6: Final answer
    x = 312,782.06

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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.