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Finding the Fourth Proportional to 29.45, 40.39 and 27.70

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Solution

The fourth proportional to 29.45, 40.39 and 27.70 is: 37.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.45 : 40.39 = 27.70 : x
  2. Step 2: Convert to fraction form
    29.45/40.39 = 27.70/x
  3. Step 3: Cross multiply
    29.45x = 40.39 × 27.70
  4. Step 4: Simplify right side
    29.45x = 1,118.63
  5. Step 5: Solve for x
    x = 1,118.63/29.45
  6. Step 6: Final answer
    x = 37.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.