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Finding the Fourth Proportional to 849.89, 1,274.91 and 330.13

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Solution

The fourth proportional to 849.89, 1,274.91 and 330.13 is: 495.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.89 : 1,274.91 = 330.13 : x
  2. Step 2: Convert to fraction form
    849.89/1,274.91 = 330.13/x
  3. Step 3: Cross multiply
    849.89x = 1,274.91 × 330.13
  4. Step 4: Simplify right side
    849.89x = 420,886.04
  5. Step 5: Solve for x
    x = 420,886.04/849.89
  6. Step 6: Final answer
    x = 495.22

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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.