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Finding the Fourth Proportional to 378.48, 567.72 and 161.92

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Solution

The fourth proportional to 378.48, 567.72 and 161.92 is: 242.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.48 : 567.72 = 161.92 : x
  2. Step 2: Convert to fraction form
    378.48/567.72 = 161.92/x
  3. Step 3: Cross multiply
    378.48x = 567.72 × 161.92
  4. Step 4: Simplify right side
    378.48x = 91,925.22
  5. Step 5: Solve for x
    x = 91,925.22/378.48
  6. Step 6: Final answer
    x = 242.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.