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Finding the Fourth Proportional to 966.55, 1,334.78 and 668.56

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Solution

The fourth proportional to 966.55, 1,334.78 and 668.56 is: 923.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.55 : 1,334.78 = 668.56 : x
  2. Step 2: Convert to fraction form
    966.55/1,334.78 = 668.56/x
  3. Step 3: Cross multiply
    966.55x = 1,334.78 × 668.56
  4. Step 4: Simplify right side
    966.55x = 892,380.52
  5. Step 5: Solve for x
    x = 892,380.52/966.55
  6. Step 6: Final answer
    x = 923.26

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1.5x scale

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.