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Finding the Fourth Proportional to 642.92, 964.67 and 480.92

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Solution

The fourth proportional to 642.92, 964.67 and 480.92 is: 721.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.92 : 964.67 = 480.92 : x
  2. Step 2: Convert to fraction form
    642.92/964.67 = 480.92/x
  3. Step 3: Cross multiply
    642.92x = 964.67 × 480.92
  4. Step 4: Simplify right side
    642.92x = 463,921.87
  5. Step 5: Solve for x
    x = 463,921.87/642.92
  6. Step 6: Final answer
    x = 721.59

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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.