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Finding the Fourth Proportional to 1,020.60, 1,531 and 327.30

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Solution

The fourth proportional to 1,020.60, 1,531 and 327.30 is: 490.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.60 : 1,531 = 327.30 : x
  2. Step 2: Convert to fraction form
    1,020.60/1,531 = 327.30/x
  3. Step 3: Cross multiply
    1,020.60x = 1,531 × 327.30
  4. Step 4: Simplify right side
    1,020.60x = 501,096.30
  5. Step 5: Solve for x
    x = 501,096.30/1,020.60
  6. Step 6: Final answer
    x = 490.98

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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.