Home / 2,813.20-4,220.40-1,426.72

Finding the Fourth Proportional to 2,813.20, 4,220.40 and 1,426.72

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Solution

The fourth proportional to 2,813.20, 4,220.40 and 1,426.72 is: 2,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.20 : 4,220.40 = 1,426.72 : x
  2. Step 2: Convert to fraction form
    2,813.20/4,220.40 = 1,426.72/x
  3. Step 3: Cross multiply
    2,813.20x = 4,220.40 × 1,426.72
  4. Step 4: Simplify right side
    2,813.20x = 6,021,329.09
  5. Step 5: Solve for x
    x = 6,021,329.09/2,813.20
  6. Step 6: Final answer
    x = 2,140.38

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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.