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Finding the Fourth Proportional to 680.03, 1,020.28 and 269.36

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Solution

The fourth proportional to 680.03, 1,020.28 and 269.36 is: 404.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.03 : 1,020.28 = 269.36 : x
  2. Step 2: Convert to fraction form
    680.03/1,020.28 = 269.36/x
  3. Step 3: Cross multiply
    680.03x = 1,020.28 × 269.36
  4. Step 4: Simplify right side
    680.03x = 274,822.62
  5. Step 5: Solve for x
    x = 274,822.62/680.03
  6. Step 6: Final answer
    x = 404.13

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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.