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Finding the Fourth Proportional to 288,604.40, 398,272.92 and 161,279.96

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Solution

The fourth proportional to 288,604.40, 398,272.92 and 161,279.96 is: 222,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,604.40 : 398,272.92 = 161,279.96 : x
  2. Step 2: Convert to fraction form
    288,604.40/398,272.92 = 161,279.96/x
  3. Step 3: Cross multiply
    288,604.40x = 398,272.92 × 161,279.96
  4. Step 4: Simplify right side
    288,604.40x = 64,233,440,606.68
  5. Step 5: Solve for x
    x = 64,233,440,606.68/288,604.40
  6. Step 6: Final answer
    x = 222,565.70

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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.