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Finding the Fourth Proportional to 65.40, 98.71 and 63.57

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Solution

The fourth proportional to 65.40, 98.71 and 63.57 is: 95.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.40 : 98.71 = 63.57 : x
  2. Step 2: Convert to fraction form
    65.40/98.71 = 63.57/x
  3. Step 3: Cross multiply
    65.40x = 98.71 × 63.57
  4. Step 4: Simplify right side
    65.40x = 6,274.99
  5. Step 5: Solve for x
    x = 6,274.99/65.40
  6. Step 6: Final answer
    x = 95.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.