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Finding the Fourth Proportional to 694.56, 958.80 and 663.60

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Solution

The fourth proportional to 694.56, 958.80 and 663.60 is: 916.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.56 : 958.80 = 663.60 : x
  2. Step 2: Convert to fraction form
    694.56/958.80 = 663.60/x
  3. Step 3: Cross multiply
    694.56x = 958.80 × 663.60
  4. Step 4: Simplify right side
    694.56x = 636,259.68
  5. Step 5: Solve for x
    x = 636,259.68/694.56
  6. Step 6: Final answer
    x = 916.06

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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.