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Finding the Fourth Proportional to 48.56, 73.24 and 43.28

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Solution

The fourth proportional to 48.56, 73.24 and 43.28 is: 65.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.56 : 73.24 = 43.28 : x
  2. Step 2: Convert to fraction form
    48.56/73.24 = 43.28/x
  3. Step 3: Cross multiply
    48.56x = 73.24 × 43.28
  4. Step 4: Simplify right side
    48.56x = 3,169.83
  5. Step 5: Solve for x
    x = 3,169.83/48.56
  6. Step 6: Final answer
    x = 65.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.