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Finding the Fourth Proportional to 55.40, 82.70 and 48.92

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Solution

The fourth proportional to 55.40, 82.70 and 48.92 is: 73.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.40 : 82.70 = 48.92 : x
  2. Step 2: Convert to fraction form
    55.40/82.70 = 48.92/x
  3. Step 3: Cross multiply
    55.40x = 82.70 × 48.92
  4. Step 4: Simplify right side
    55.40x = 4,045.68
  5. Step 5: Solve for x
    x = 4,045.68/55.40
  6. Step 6: Final answer
    x = 73.03

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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.