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Finding the Fourth Proportional to 55.84, 77.01 and 39.22

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Solution

The fourth proportional to 55.84, 77.01 and 39.22 is: 54.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.84 : 77.01 = 39.22 : x
  2. Step 2: Convert to fraction form
    55.84/77.01 = 39.22/x
  3. Step 3: Cross multiply
    55.84x = 77.01 × 39.22
  4. Step 4: Simplify right side
    55.84x = 3,020.33
  5. Step 5: Solve for x
    x = 3,020.33/55.84
  6. Step 6: Final answer
    x = 54.09

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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.