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Finding the Fourth Proportional to 267.45, 400.95 and 145.57

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Solution

The fourth proportional to 267.45, 400.95 and 145.57 is: 218.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.45 : 400.95 = 145.57 : x
  2. Step 2: Convert to fraction form
    267.45/400.95 = 145.57/x
  3. Step 3: Cross multiply
    267.45x = 400.95 × 145.57
  4. Step 4: Simplify right side
    267.45x = 58,366.29
  5. Step 5: Solve for x
    x = 58,366.29/267.45
  6. Step 6: Final answer
    x = 218.23

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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.