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Finding the Fourth Proportional to 48.74, 72.80 and 41.91

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Solution

The fourth proportional to 48.74, 72.80 and 41.91 is: 62.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.74 : 72.80 = 41.91 : x
  2. Step 2: Convert to fraction form
    48.74/72.80 = 41.91/x
  3. Step 3: Cross multiply
    48.74x = 72.80 × 41.91
  4. Step 4: Simplify right side
    48.74x = 3,050.84
  5. Step 5: Solve for x
    x = 3,050.84/48.74
  6. Step 6: Final answer
    x = 62.59

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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.