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Finding the Fourth Proportional to 312.38, 430.88 and 246.86

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Solution

The fourth proportional to 312.38, 430.88 and 246.86 is: 340.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.38 : 430.88 = 246.86 : x
  2. Step 2: Convert to fraction form
    312.38/430.88 = 246.86/x
  3. Step 3: Cross multiply
    312.38x = 430.88 × 246.86
  4. Step 4: Simplify right side
    312.38x = 106,367.04
  5. Step 5: Solve for x
    x = 106,367.04/312.38
  6. Step 6: Final answer
    x = 340.51

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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.