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Finding the Fourth Proportional to 762.84, 1,144.72 and 330.02

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Solution

The fourth proportional to 762.84, 1,144.72 and 330.02 is: 495.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.84 : 1,144.72 = 330.02 : x
  2. Step 2: Convert to fraction form
    762.84/1,144.72 = 330.02/x
  3. Step 3: Cross multiply
    762.84x = 1,144.72 × 330.02
  4. Step 4: Simplify right side
    762.84x = 377,780.49
  5. Step 5: Solve for x
    x = 377,780.49/762.84
  6. Step 6: Final answer
    x = 495.23

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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.