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Finding the Fourth Proportional to 378.55, 567.57 and 131.69

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Solution

The fourth proportional to 378.55, 567.57 and 131.69 is: 197.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.55 : 567.57 = 131.69 : x
  2. Step 2: Convert to fraction form
    378.55/567.57 = 131.69/x
  3. Step 3: Cross multiply
    378.55x = 567.57 × 131.69
  4. Step 4: Simplify right side
    378.55x = 74,743.29
  5. Step 5: Solve for x
    x = 74,743.29/378.55
  6. Step 6: Final answer
    x = 197.45

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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.