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Finding the Fourth Proportional to 32.88, 45.16 and 30.48

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Solution

The fourth proportional to 32.88, 45.16 and 30.48 is: 41.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.88 : 45.16 = 30.48 : x
  2. Step 2: Convert to fraction form
    32.88/45.16 = 30.48/x
  3. Step 3: Cross multiply
    32.88x = 45.16 × 30.48
  4. Step 4: Simplify right side
    32.88x = 1,376.48
  5. Step 5: Solve for x
    x = 1,376.48/32.88
  6. Step 6: Final answer
    x = 41.86

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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.