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Finding the Fourth Proportional to 508.43, 762.60 and 215.91

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Solution

The fourth proportional to 508.43, 762.60 and 215.91 is: 323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.43 : 762.60 = 215.91 : x
  2. Step 2: Convert to fraction form
    508.43/762.60 = 215.91/x
  3. Step 3: Cross multiply
    508.43x = 762.60 × 215.91
  4. Step 4: Simplify right side
    508.43x = 164,652.97
  5. Step 5: Solve for x
    x = 164,652.97/508.43
  6. Step 6: Final answer
    x = 323.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.