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Finding the Fourth Proportional to 630.87, 946.21 and 168.68

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Solution

The fourth proportional to 630.87, 946.21 and 168.68 is: 252.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.87 : 946.21 = 168.68 : x
  2. Step 2: Convert to fraction form
    630.87/946.21 = 168.68/x
  3. Step 3: Cross multiply
    630.87x = 946.21 × 168.68
  4. Step 4: Simplify right side
    630.87x = 159,606.70
  5. Step 5: Solve for x
    x = 159,606.70/630.87
  6. Step 6: Final answer
    x = 252.99

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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.