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Finding the Fourth Proportional to 55.47, 76.55 and 34.76

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Solution

The fourth proportional to 55.47, 76.55 and 34.76 is: 47.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.47 : 76.55 = 34.76 : x
  2. Step 2: Convert to fraction form
    55.47/76.55 = 34.76/x
  3. Step 3: Cross multiply
    55.47x = 76.55 × 34.76
  4. Step 4: Simplify right side
    55.47x = 2,660.92
  5. Step 5: Solve for x
    x = 2,660.92/55.47
  6. Step 6: Final answer
    x = 47.97

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Find fourth proportional to 27.74, 38.28 and 17.38
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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.