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Finding the Fourth Proportional to 288,684, 398,383.92 and 161,356.86

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Solution

The fourth proportional to 288,684, 398,383.92 and 161,356.86 is: 222,672.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,684 : 398,383.92 = 161,356.86 : x
  2. Step 2: Convert to fraction form
    288,684/398,383.92 = 161,356.86/x
  3. Step 3: Cross multiply
    288,684x = 398,383.92 × 161,356.86
  4. Step 4: Simplify right side
    288,684x = 64,281,978,405.69
  5. Step 5: Solve for x
    x = 64,281,978,405.69/288,684
  6. Step 6: Final answer
    x = 222,672.47

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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.