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Finding the Fourth Proportional to 964.43, 1,331.11 and 571.67

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Solution

The fourth proportional to 964.43, 1,331.11 and 571.67 is: 789.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.43 : 1,331.11 = 571.67 : x
  2. Step 2: Convert to fraction form
    964.43/1,331.11 = 571.67/x
  3. Step 3: Cross multiply
    964.43x = 1,331.11 × 571.67
  4. Step 4: Simplify right side
    964.43x = 760,955.65
  5. Step 5: Solve for x
    x = 760,955.65/964.43
  6. Step 6: Final answer
    x = 789.02

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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.