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Finding the Fourth Proportional to 55.04, 82 and 53.60

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Solution

The fourth proportional to 55.04, 82 and 53.60 is: 79.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.04 : 82 = 53.60 : x
  2. Step 2: Convert to fraction form
    55.04/82 = 53.60/x
  3. Step 3: Cross multiply
    55.04x = 82 × 53.60
  4. Step 4: Simplify right side
    55.04x = 4,395.20
  5. Step 5: Solve for x
    x = 4,395.20/55.04
  6. Step 6: Final answer
    x = 79.85

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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.