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Finding the Fourth Proportional to 32.07, 47.90 and 28.49

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Solution

The fourth proportional to 32.07, 47.90 and 28.49 is: 42.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.07 : 47.90 = 28.49 : x
  2. Step 2: Convert to fraction form
    32.07/47.90 = 28.49/x
  3. Step 3: Cross multiply
    32.07x = 47.90 × 28.49
  4. Step 4: Simplify right side
    32.07x = 1,364.29
  5. Step 5: Solve for x
    x = 1,364.29/32.07
  6. Step 6: Final answer
    x = 42.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.