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Finding the Fourth Proportional to 762.89, 1,144.09 and 397.48

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Solution

The fourth proportional to 762.89, 1,144.09 and 397.48 is: 596.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.89 : 1,144.09 = 397.48 : x
  2. Step 2: Convert to fraction form
    762.89/1,144.09 = 397.48/x
  3. Step 3: Cross multiply
    762.89x = 1,144.09 × 397.48
  4. Step 4: Simplify right side
    762.89x = 454,752.89
  5. Step 5: Solve for x
    x = 454,752.89/762.89
  6. Step 6: Final answer
    x = 596.09

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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.