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Finding the Fourth Proportional to 352.52, 487.05 and 310.94

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Solution

The fourth proportional to 352.52, 487.05 and 310.94 is: 429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.52 : 487.05 = 310.94 : x
  2. Step 2: Convert to fraction form
    352.52/487.05 = 310.94/x
  3. Step 3: Cross multiply
    352.52x = 487.05 × 310.94
  4. Step 4: Simplify right side
    352.52x = 151,443.33
  5. Step 5: Solve for x
    x = 151,443.33/352.52
  6. Step 6: Final answer
    x = 429.60

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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.