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Finding the Fourth Proportional to 490.68, 677.08 and 294.16

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Solution

The fourth proportional to 490.68, 677.08 and 294.16 is: 405.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.68 : 677.08 = 294.16 : x
  2. Step 2: Convert to fraction form
    490.68/677.08 = 294.16/x
  3. Step 3: Cross multiply
    490.68x = 677.08 × 294.16
  4. Step 4: Simplify right side
    490.68x = 199,169.85
  5. Step 5: Solve for x
    x = 199,169.85/490.68
  6. Step 6: Final answer
    x = 405.91

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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.