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Finding the Fourth Proportional to 963.24, 1,328.64 and 668.66

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Solution

The fourth proportional to 963.24, 1,328.64 and 668.66 is: 922.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.24 : 1,328.64 = 668.66 : x
  2. Step 2: Convert to fraction form
    963.24/1,328.64 = 668.66/x
  3. Step 3: Cross multiply
    963.24x = 1,328.64 × 668.66
  4. Step 4: Simplify right side
    963.24x = 888,408.42
  5. Step 5: Solve for x
    x = 888,408.42/963.24
  6. Step 6: Final answer
    x = 922.31

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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.