Home / 1,856.53-2,561.68-1,296.80

Finding the Fourth Proportional to 1,856.53, 2,561.68 and 1,296.80

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Solution

The fourth proportional to 1,856.53, 2,561.68 and 1,296.80 is: 1,789.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.53 : 2,561.68 = 1,296.80 : x
  2. Step 2: Convert to fraction form
    1,856.53/2,561.68 = 1,296.80/x
  3. Step 3: Cross multiply
    1,856.53x = 2,561.68 × 1,296.80
  4. Step 4: Simplify right side
    1,856.53x = 3,321,986.62
  5. Step 5: Solve for x
    x = 3,321,986.62/1,856.53
  6. Step 6: Final answer
    x = 1,789.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.