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Finding the Fourth Proportional to 48.80, 66.90 and 48.32

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Solution

The fourth proportional to 48.80, 66.90 and 48.32 is: 66.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.80 : 66.90 = 48.32 : x
  2. Step 2: Convert to fraction form
    48.80/66.90 = 48.32/x
  3. Step 3: Cross multiply
    48.80x = 66.90 × 48.32
  4. Step 4: Simplify right side
    48.80x = 3,232.61
  5. Step 5: Solve for x
    x = 3,232.61/48.80
  6. Step 6: Final answer
    x = 66.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.