Home / 1,020.85-1,531.29-327.52

Finding the Fourth Proportional to 1,020.85, 1,531.29 and 327.52

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Solution

The fourth proportional to 1,020.85, 1,531.29 and 327.52 is: 491.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.85 : 1,531.29 = 327.52 : x
  2. Step 2: Convert to fraction form
    1,020.85/1,531.29 = 327.52/x
  3. Step 3: Cross multiply
    1,020.85x = 1,531.29 × 327.52
  4. Step 4: Simplify right side
    1,020.85x = 501,528.10
  5. Step 5: Solve for x
    x = 501,528.10/1,020.85
  6. Step 6: Final answer
    x = 491.28

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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.