Home / 1,426.81-2,140.52-810.80

Finding the Fourth Proportional to 1,426.81, 2,140.52 and 810.80

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Solution

The fourth proportional to 1,426.81, 2,140.52 and 810.80 is: 1,216.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.81 : 2,140.52 = 810.80 : x
  2. Step 2: Convert to fraction form
    1,426.81/2,140.52 = 810.80/x
  3. Step 3: Cross multiply
    1,426.81x = 2,140.52 × 810.80
  4. Step 4: Simplify right side
    1,426.81x = 1,735,529.56
  5. Step 5: Solve for x
    x = 1,735,529.56/1,426.81
  6. Step 6: Final answer
    x = 1,216.37

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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.