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Finding the Fourth Proportional to 375.90, 564.47 and 267.78

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Solution

The fourth proportional to 375.90, 564.47 and 267.78 is: 402.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.90 : 564.47 = 267.78 : x
  2. Step 2: Convert to fraction form
    375.90/564.47 = 267.78/x
  3. Step 3: Cross multiply
    375.90x = 564.47 × 267.78
  4. Step 4: Simplify right side
    375.90x = 151,153.78
  5. Step 5: Solve for x
    x = 151,153.78/375.90
  6. Step 6: Final answer
    x = 402.11

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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.