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Finding the Fourth Proportional to 84.44, 116.54 and 64.80

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Solution

The fourth proportional to 84.44, 116.54 and 64.80 is: 89.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.44 : 116.54 = 64.80 : x
  2. Step 2: Convert to fraction form
    84.44/116.54 = 64.80/x
  3. Step 3: Cross multiply
    84.44x = 116.54 × 64.80
  4. Step 4: Simplify right side
    84.44x = 7,551.71
  5. Step 5: Solve for x
    x = 7,551.71/84.44
  6. Step 6: Final answer
    x = 89.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.