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Finding the Fourth Proportional to 1,260.53, 1,891.13 and 480.55

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Solution

The fourth proportional to 1,260.53, 1,891.13 and 480.55 is: 720.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.53 : 1,891.13 = 480.55 : x
  2. Step 2: Convert to fraction form
    1,260.53/1,891.13 = 480.55/x
  3. Step 3: Cross multiply
    1,260.53x = 1,891.13 × 480.55
  4. Step 4: Simplify right side
    1,260.53x = 908,770.66
  5. Step 5: Solve for x
    x = 908,770.66/1,260.53
  6. Step 6: Final answer
    x = 720.94

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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.