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Finding the Fourth Proportional to 65.79, 98.67 and 65.43

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Solution

The fourth proportional to 65.79, 98.67 and 65.43 is: 98.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.79 : 98.67 = 65.43 : x
  2. Step 2: Convert to fraction form
    65.79/98.67 = 65.43/x
  3. Step 3: Cross multiply
    65.79x = 98.67 × 65.43
  4. Step 4: Simplify right side
    65.79x = 6,455.98
  5. Step 5: Solve for x
    x = 6,455.98/65.79
  6. Step 6: Final answer
    x = 98.13

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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.