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Finding the Fourth Proportional to 291.20, 400.97 and 246.65

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Solution

The fourth proportional to 291.20, 400.97 and 246.65 is: 339.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.20 : 400.97 = 246.65 : x
  2. Step 2: Convert to fraction form
    291.20/400.97 = 246.65/x
  3. Step 3: Cross multiply
    291.20x = 400.97 × 246.65
  4. Step 4: Simplify right side
    291.20x = 98,898.02
  5. Step 5: Solve for x
    x = 98,898.02/291.20
  6. Step 6: Final answer
    x = 339.62

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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.