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Finding the Fourth Proportional to 52.08, 77.66 and 47.48

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Solution

The fourth proportional to 52.08, 77.66 and 47.48 is: 70.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.08 : 77.66 = 47.48 : x
  2. Step 2: Convert to fraction form
    52.08/77.66 = 47.48/x
  3. Step 3: Cross multiply
    52.08x = 77.66 × 47.48
  4. Step 4: Simplify right side
    52.08x = 3,687.30
  5. Step 5: Solve for x
    x = 3,687.30/52.08
  6. Step 6: Final answer
    x = 70.80

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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.