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Finding the Fourth Proportional to 55.35, 82.55 and 49.28

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Solution

The fourth proportional to 55.35, 82.55 and 49.28 is: 73.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.35 : 82.55 = 49.28 : x
  2. Step 2: Convert to fraction form
    55.35/82.55 = 49.28/x
  3. Step 3: Cross multiply
    55.35x = 82.55 × 49.28
  4. Step 4: Simplify right side
    55.35x = 4,067.77
  5. Step 5: Solve for x
    x = 4,067.77/55.35
  6. Step 6: Final answer
    x = 73.49

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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.