Home / 1,276.91-1,916.70-1,131.59

Finding the Fourth Proportional to 1,276.91, 1,916.70 and 1,131.59

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Solution

The fourth proportional to 1,276.91, 1,916.70 and 1,131.59 is: 1,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.91 : 1,916.70 = 1,131.59 : x
  2. Step 2: Convert to fraction form
    1,276.91/1,916.70 = 1,131.59/x
  3. Step 3: Cross multiply
    1,276.91x = 1,916.70 × 1,131.59
  4. Step 4: Simplify right side
    1,276.91x = 2,168,912.56
  5. Step 5: Solve for x
    x = 2,168,912.56/1,276.91
  6. Step 6: Final answer
    x = 1,698.57

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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.