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Finding the Fourth Proportional to 506.76, 760.16 and 218.20

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Solution

The fourth proportional to 506.76, 760.16 and 218.20 is: 327.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.76 : 760.16 = 218.20 : x
  2. Step 2: Convert to fraction form
    506.76/760.16 = 218.20/x
  3. Step 3: Cross multiply
    506.76x = 760.16 × 218.20
  4. Step 4: Simplify right side
    506.76x = 165,866.91
  5. Step 5: Solve for x
    x = 165,866.91/506.76
  6. Step 6: Final answer
    x = 327.31

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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.