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Finding the Fourth Proportional to 312.38, 430.32 and 263.24

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Solution

The fourth proportional to 312.38, 430.32 and 263.24 is: 362.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.38 : 430.32 = 263.24 : x
  2. Step 2: Convert to fraction form
    312.38/430.32 = 263.24/x
  3. Step 3: Cross multiply
    312.38x = 430.32 × 263.24
  4. Step 4: Simplify right side
    312.38x = 113,277.44
  5. Step 5: Solve for x
    x = 113,277.44/312.38
  6. Step 6: Final answer
    x = 362.63

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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.