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Finding the Fourth Proportional to 1,260.95, 1,891.49 and 1,191.69

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Solution

The fourth proportional to 1,260.95, 1,891.49 and 1,191.69 is: 1,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.95 : 1,891.49 = 1,191.69 : x
  2. Step 2: Convert to fraction form
    1,260.95/1,891.49 = 1,191.69/x
  3. Step 3: Cross multiply
    1,260.95x = 1,891.49 × 1,191.69
  4. Step 4: Simplify right side
    1,260.95x = 2,254,063.76
  5. Step 5: Solve for x
    x = 2,254,063.76/1,260.95
  6. Step 6: Final answer
    x = 1,787.60

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1.5x scale

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.