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Finding the Fourth Proportional to 960.41, 1,439.59 and 685.67

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Solution

The fourth proportional to 960.41, 1,439.59 and 685.67 is: 1,027.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.41 : 1,439.59 = 685.67 : x
  2. Step 2: Convert to fraction form
    960.41/1,439.59 = 685.67/x
  3. Step 3: Cross multiply
    960.41x = 1,439.59 × 685.67
  4. Step 4: Simplify right side
    960.41x = 987,080.10
  5. Step 5: Solve for x
    x = 987,080.10/960.41
  6. Step 6: Final answer
    x = 1,027.77

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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.