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Finding the Fourth Proportional to 32.98, 45.40 and 27.76

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Solution

The fourth proportional to 32.98, 45.40 and 27.76 is: 38.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.98 : 45.40 = 27.76 : x
  2. Step 2: Convert to fraction form
    32.98/45.40 = 27.76/x
  3. Step 3: Cross multiply
    32.98x = 45.40 × 27.76
  4. Step 4: Simplify right side
    32.98x = 1,260.30
  5. Step 5: Solve for x
    x = 1,260.30/32.98
  6. Step 6: Final answer
    x = 38.21

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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.