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Finding the Fourth Proportional to 724.21, 1,084.78 and 334.53

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Solution

The fourth proportional to 724.21, 1,084.78 and 334.53 is: 501.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.21 : 1,084.78 = 334.53 : x
  2. Step 2: Convert to fraction form
    724.21/1,084.78 = 334.53/x
  3. Step 3: Cross multiply
    724.21x = 1,084.78 × 334.53
  4. Step 4: Simplify right side
    724.21x = 362,891.45
  5. Step 5: Solve for x
    x = 362,891.45/724.21
  6. Step 6: Final answer
    x = 501.09

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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.