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Finding the Fourth Proportional to 65.79, 98.30 and 49.25

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Solution

The fourth proportional to 65.79, 98.30 and 49.25 is: 73.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.79 : 98.30 = 49.25 : x
  2. Step 2: Convert to fraction form
    65.79/98.30 = 49.25/x
  3. Step 3: Cross multiply
    65.79x = 98.30 × 49.25
  4. Step 4: Simplify right side
    65.79x = 4,841.64
  5. Step 5: Solve for x
    x = 4,841.64/65.79
  6. Step 6: Final answer
    x = 73.59

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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.