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Finding the Fourth Proportional to 47.50, 65.56 and 26.78

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Solution

The fourth proportional to 47.50, 65.56 and 26.78 is: 36.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.50 : 65.56 = 26.78 : x
  2. Step 2: Convert to fraction form
    47.50/65.56 = 26.78/x
  3. Step 3: Cross multiply
    47.50x = 65.56 × 26.78
  4. Step 4: Simplify right side
    47.50x = 1,755.72
  5. Step 5: Solve for x
    x = 1,755.72/47.50
  6. Step 6: Final answer
    x = 36.96

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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.