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Finding the Fourth Proportional to 32.55, 48.75 and 28.09

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Solution

The fourth proportional to 32.55, 48.75 and 28.09 is: 42.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.55 : 48.75 = 28.09 : x
  2. Step 2: Convert to fraction form
    32.55/48.75 = 28.09/x
  3. Step 3: Cross multiply
    32.55x = 48.75 × 28.09
  4. Step 4: Simplify right side
    32.55x = 1,369.39
  5. Step 5: Solve for x
    x = 1,369.39/32.55
  6. Step 6: Final answer
    x = 42.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.