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Finding the Fourth Proportional to 32.88, 45.30 and 28.02

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Solution

The fourth proportional to 32.88, 45.30 and 28.02 is: 38.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.88 : 45.30 = 28.02 : x
  2. Step 2: Convert to fraction form
    32.88/45.30 = 28.02/x
  3. Step 3: Cross multiply
    32.88x = 45.30 × 28.02
  4. Step 4: Simplify right side
    32.88x = 1,269.31
  5. Step 5: Solve for x
    x = 1,269.31/32.88
  6. Step 6: Final answer
    x = 38.60

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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.