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Finding the Fourth Proportional to 640.91, 961.06 and 294.14

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Solution

The fourth proportional to 640.91, 961.06 and 294.14 is: 441.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.91 : 961.06 = 294.14 : x
  2. Step 2: Convert to fraction form
    640.91/961.06 = 294.14/x
  3. Step 3: Cross multiply
    640.91x = 961.06 × 294.14
  4. Step 4: Simplify right side
    640.91x = 282,686.19
  5. Step 5: Solve for x
    x = 282,686.19/640.91
  6. Step 6: Final answer
    x = 441.07

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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.