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Finding the Fourth Proportional to 763.72, 1,144.80 and 353.16

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Solution

The fourth proportional to 763.72, 1,144.80 and 353.16 is: 529.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.72 : 1,144.80 = 353.16 : x
  2. Step 2: Convert to fraction form
    763.72/1,144.80 = 353.16/x
  3. Step 3: Cross multiply
    763.72x = 1,144.80 × 353.16
  4. Step 4: Simplify right side
    763.72x = 404,297.57
  5. Step 5: Solve for x
    x = 404,297.57/763.72
  6. Step 6: Final answer
    x = 529.38

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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.