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Finding the Fourth Proportional to 960.96, 1,325.56 and 665.71

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Solution

The fourth proportional to 960.96, 1,325.56 and 665.71 is: 918.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.96 : 1,325.56 = 665.71 : x
  2. Step 2: Convert to fraction form
    960.96/1,325.56 = 665.71/x
  3. Step 3: Cross multiply
    960.96x = 1,325.56 × 665.71
  4. Step 4: Simplify right side
    960.96x = 882,438.55
  5. Step 5: Solve for x
    x = 882,438.55/960.96
  6. Step 6: Final answer
    x = 918.29

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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.