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Finding the Fourth Proportional to 318.52, 441.31 and 310.60

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Solution

The fourth proportional to 318.52, 441.31 and 310.60 is: 430.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.52 : 441.31 = 310.60 : x
  2. Step 2: Convert to fraction form
    318.52/441.31 = 310.60/x
  3. Step 3: Cross multiply
    318.52x = 441.31 × 310.60
  4. Step 4: Simplify right side
    318.52x = 137,070.89
  5. Step 5: Solve for x
    x = 137,070.89/318.52
  6. Step 6: Final answer
    x = 430.34

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.