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Finding the Fourth Proportional to 969.15, 1,452.03 and 660

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Solution

The fourth proportional to 969.15, 1,452.03 and 660 is: 988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.15 : 1,452.03 = 660 : x
  2. Step 2: Convert to fraction form
    969.15/1,452.03 = 660/x
  3. Step 3: Cross multiply
    969.15x = 1,452.03 × 660
  4. Step 4: Simplify right side
    969.15x = 958,339.80
  5. Step 5: Solve for x
    x = 958,339.80/969.15
  6. Step 6: Final answer
    x = 988.85

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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.