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Finding the Fourth Proportional to 663.70, 994.36 and 624.66

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Solution

The fourth proportional to 663.70, 994.36 and 624.66 is: 935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.70 : 994.36 = 624.66 : x
  2. Step 2: Convert to fraction form
    663.70/994.36 = 624.66/x
  3. Step 3: Cross multiply
    663.70x = 994.36 × 624.66
  4. Step 4: Simplify right side
    663.70x = 621,136.92
  5. Step 5: Solve for x
    x = 621,136.92/663.70
  6. Step 6: Final answer
    x = 935.87

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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.