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Finding the Fourth Proportional to 29, 40.19 and 28.55

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Solution

The fourth proportional to 29, 40.19 and 28.55 is: 39.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    29 : 40.19 = 28.55 : x
  2. Step 2: Convert to fraction form
    29/40.19 = 28.55/x
  3. Step 3: Cross multiply
    29x = 40.19 × 28.55
  4. Step 4: Simplify right side
    29x = 1,147.42
  5. Step 5: Solve for x
    x = 1,147.42/29
  6. Step 6: Final answer
    x = 39.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.