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Finding the Fourth Proportional to 313.92, 434.32 and 275.20

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Solution

The fourth proportional to 313.92, 434.32 and 275.20 is: 380.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.92 : 434.32 = 275.20 : x
  2. Step 2: Convert to fraction form
    313.92/434.32 = 275.20/x
  3. Step 3: Cross multiply
    313.92x = 434.32 × 275.20
  4. Step 4: Simplify right side
    313.92x = 119,524.86
  5. Step 5: Solve for x
    x = 119,524.86/313.92
  6. Step 6: Final answer
    x = 380.75

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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.