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Finding the Fourth Proportional to 1,260.57, 1,891.07 and 480.64

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Solution

The fourth proportional to 1,260.57, 1,891.07 and 480.64 is: 721.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.57 : 1,891.07 = 480.64 : x
  2. Step 2: Convert to fraction form
    1,260.57/1,891.07 = 480.64/x
  3. Step 3: Cross multiply
    1,260.57x = 1,891.07 × 480.64
  4. Step 4: Simplify right side
    1,260.57x = 908,925.90
  5. Step 5: Solve for x
    x = 908,925.90/1,260.57
  6. Step 6: Final answer
    x = 721.04

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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.