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Finding the Fourth Proportional to 49.48, 68.63 and 48.20

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Solution

The fourth proportional to 49.48, 68.63 and 48.20 is: 66.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.48 : 68.63 = 48.20 : x
  2. Step 2: Convert to fraction form
    49.48/68.63 = 48.20/x
  3. Step 3: Cross multiply
    49.48x = 68.63 × 48.20
  4. Step 4: Simplify right side
    49.48x = 3,307.97
  5. Step 5: Solve for x
    x = 3,307.97/49.48
  6. Step 6: Final answer
    x = 66.85

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.