Home / 1,020.78-1,531.17-443.52

Finding the Fourth Proportional to 1,020.78, 1,531.17 and 443.52

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Solution

The fourth proportional to 1,020.78, 1,531.17 and 443.52 is: 665.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.78 : 1,531.17 = 443.52 : x
  2. Step 2: Convert to fraction form
    1,020.78/1,531.17 = 443.52/x
  3. Step 3: Cross multiply
    1,020.78x = 1,531.17 × 443.52
  4. Step 4: Simplify right side
    1,020.78x = 679,104.52
  5. Step 5: Solve for x
    x = 679,104.52/1,020.78
  6. Step 6: Final answer
    x = 665.28

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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.