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Finding the Fourth Proportional to 291.20, 435.78 and 230.04

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Solution

The fourth proportional to 291.20, 435.78 and 230.04 is: 344.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.20 : 435.78 = 230.04 : x
  2. Step 2: Convert to fraction form
    291.20/435.78 = 230.04/x
  3. Step 3: Cross multiply
    291.20x = 435.78 × 230.04
  4. Step 4: Simplify right side
    291.20x = 100,246.83
  5. Step 5: Solve for x
    x = 100,246.83/291.20
  6. Step 6: Final answer
    x = 344.26

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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.