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Finding the Fourth Proportional to 245.30, 367.98 and 80.76

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Solution

The fourth proportional to 245.30, 367.98 and 80.76 is: 121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.30 : 367.98 = 80.76 : x
  2. Step 2: Convert to fraction form
    245.30/367.98 = 80.76/x
  3. Step 3: Cross multiply
    245.30x = 367.98 × 80.76
  4. Step 4: Simplify right side
    245.30x = 29,718.06
  5. Step 5: Solve for x
    x = 29,718.06/245.30
  6. Step 6: Final answer
    x = 121.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.