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Finding the Fourth Proportional to 46.80, 64.55 and 27.39

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Solution

The fourth proportional to 46.80, 64.55 and 27.39 is: 37.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.80 : 64.55 = 27.39 : x
  2. Step 2: Convert to fraction form
    46.80/64.55 = 27.39/x
  3. Step 3: Cross multiply
    46.80x = 64.55 × 27.39
  4. Step 4: Simplify right side
    46.80x = 1,768.14
  5. Step 5: Solve for x
    x = 1,768.14/46.80
  6. Step 6: Final answer
    x = 37.78

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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.