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Finding the Fourth Proportional to 640.31, 961.07 and 294.03

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Solution

The fourth proportional to 640.31, 961.07 and 294.03 is: 441.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.31 : 961.07 = 294.03 : x
  2. Step 2: Convert to fraction form
    640.31/961.07 = 294.03/x
  3. Step 3: Cross multiply
    640.31x = 961.07 × 294.03
  4. Step 4: Simplify right side
    640.31x = 282,581.94
  5. Step 5: Solve for x
    x = 282,581.94/640.31
  6. Step 6: Final answer
    x = 441.32

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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.