Home / 1,426.20-2,139.30-502.80

Finding the Fourth Proportional to 1,426.20, 2,139.30 and 502.80

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Solution

The fourth proportional to 1,426.20, 2,139.30 and 502.80 is: 754.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.20 : 2,139.30 = 502.80 : x
  2. Step 2: Convert to fraction form
    1,426.20/2,139.30 = 502.80/x
  3. Step 3: Cross multiply
    1,426.20x = 2,139.30 × 502.80
  4. Step 4: Simplify right side
    1,426.20x = 1,075,640.04
  5. Step 5: Solve for x
    x = 1,075,640.04/1,426.20
  6. Step 6: Final answer
    x = 754.20

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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.