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Finding the Fourth Proportional to 960.36, 1,440.51 and 311.07

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Solution

The fourth proportional to 960.36, 1,440.51 and 311.07 is: 466.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.36 : 1,440.51 = 311.07 : x
  2. Step 2: Convert to fraction form
    960.36/1,440.51 = 311.07/x
  3. Step 3: Cross multiply
    960.36x = 1,440.51 × 311.07
  4. Step 4: Simplify right side
    960.36x = 448,099.45
  5. Step 5: Solve for x
    x = 448,099.45/960.36
  6. Step 6: Final answer
    x = 466.60

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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.