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Finding the Fourth Proportional to 312.46, 431.14 and 200.52

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Solution

The fourth proportional to 312.46, 431.14 and 200.52 is: 276.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.46 : 431.14 = 200.52 : x
  2. Step 2: Convert to fraction form
    312.46/431.14 = 200.52/x
  3. Step 3: Cross multiply
    312.46x = 431.14 × 200.52
  4. Step 4: Simplify right side
    312.46x = 86,451.19
  5. Step 5: Solve for x
    x = 86,451.19/312.46
  6. Step 6: Final answer
    x = 276.68

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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.