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Finding the Fourth Proportional to 55.08, 75 and 54.96

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Solution

The fourth proportional to 55.08, 75 and 54.96 is: 74.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.08 : 75 = 54.96 : x
  2. Step 2: Convert to fraction form
    55.08/75 = 54.96/x
  3. Step 3: Cross multiply
    55.08x = 75 × 54.96
  4. Step 4: Simplify right side
    55.08x = 4,122
  5. Step 5: Solve for x
    x = 4,122/55.08
  6. Step 6: Final answer
    x = 74.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.