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Finding the Fourth Proportional to 378.15, 567.29 and 161.72

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Solution

The fourth proportional to 378.15, 567.29 and 161.72 is: 242.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.15 : 567.29 = 161.72 : x
  2. Step 2: Convert to fraction form
    378.15/567.29 = 161.72/x
  3. Step 3: Cross multiply
    378.15x = 567.29 × 161.72
  4. Step 4: Simplify right side
    378.15x = 91,741.83
  5. Step 5: Solve for x
    x = 91,741.83/378.15
  6. Step 6: Final answer
    x = 242.61

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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.