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Finding the Fourth Proportional to 52.66, 78.85 and 38.22

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Solution

The fourth proportional to 52.66, 78.85 and 38.22 is: 57.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.66 : 78.85 = 38.22 : x
  2. Step 2: Convert to fraction form
    52.66/78.85 = 38.22/x
  3. Step 3: Cross multiply
    52.66x = 78.85 × 38.22
  4. Step 4: Simplify right side
    52.66x = 3,013.65
  5. Step 5: Solve for x
    x = 3,013.65/52.66
  6. Step 6: Final answer
    x = 57.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.