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Finding the Fourth Proportional to 288,631.05, 398,323.15 and 161,306.64

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Solution

The fourth proportional to 288,631.05, 398,323.15 and 161,306.64 is: 222,610.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,631.05 : 398,323.15 = 161,306.64 : x
  2. Step 2: Convert to fraction form
    288,631.05/398,323.15 = 161,306.64/x
  3. Step 3: Cross multiply
    288,631.05x = 398,323.15 × 161,306.64
  4. Step 4: Simplify right side
    288,631.05x = 64,252,168,960.72
  5. Step 5: Solve for x
    x = 64,252,168,960.72/288,631.05
  6. Step 6: Final answer
    x = 222,610.04

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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.