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Finding the Fourth Proportional to 960.72, 1,441.16 and 474.16

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Solution

The fourth proportional to 960.72, 1,441.16 and 474.16 is: 711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.72 : 1,441.16 = 474.16 : x
  2. Step 2: Convert to fraction form
    960.72/1,441.16 = 474.16/x
  3. Step 3: Cross multiply
    960.72x = 1,441.16 × 474.16
  4. Step 4: Simplify right side
    960.72x = 683,340.43
  5. Step 5: Solve for x
    x = 683,340.43/960.72
  6. Step 6: Final answer
    x = 711.28

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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.