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Finding the Fourth Proportional to 29.28, 40.38 and 19.57

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Solution

The fourth proportional to 29.28, 40.38 and 19.57 is: 26.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.28 : 40.38 = 19.57 : x
  2. Step 2: Convert to fraction form
    29.28/40.38 = 19.57/x
  3. Step 3: Cross multiply
    29.28x = 40.38 × 19.57
  4. Step 4: Simplify right side
    29.28x = 790.24
  5. Step 5: Solve for x
    x = 790.24/29.28
  6. Step 6: Final answer
    x = 26.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.