Home / 1,579.80-2,369.70-1,426.20

Finding the Fourth Proportional to 1,579.80, 2,369.70 and 1,426.20

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Solution

The fourth proportional to 1,579.80, 2,369.70 and 1,426.20 is: 2,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.80 : 2,369.70 = 1,426.20 : x
  2. Step 2: Convert to fraction form
    1,579.80/2,369.70 = 1,426.20/x
  3. Step 3: Cross multiply
    1,579.80x = 2,369.70 × 1,426.20
  4. Step 4: Simplify right side
    1,579.80x = 3,379,666.14
  5. Step 5: Solve for x
    x = 3,379,666.14/1,579.80
  6. Step 6: Final answer
    x = 2,139.30

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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.