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Finding the Fourth Proportional to 29.10, 40.80 and 29.10

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Solution

The fourth proportional to 29.10, 40.80 and 29.10 is: 40.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.10 : 40.80 = 29.10 : x
  2. Step 2: Convert to fraction form
    29.10/40.80 = 29.10/x
  3. Step 3: Cross multiply
    29.10x = 40.80 × 29.10
  4. Step 4: Simplify right side
    29.10x = 1,187.28
  5. Step 5: Solve for x
    x = 1,187.28/29.10
  6. Step 6: Final answer
    x = 40.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.