Home / 2,192.29-3,280.20-1,311.55

Finding the Fourth Proportional to 2,192.29, 3,280.20 and 1,311.55

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Solution

The fourth proportional to 2,192.29, 3,280.20 and 1,311.55 is: 1,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,192.29 : 3,280.20 = 1,311.55 : x
  2. Step 2: Convert to fraction form
    2,192.29/3,280.20 = 1,311.55/x
  3. Step 3: Cross multiply
    2,192.29x = 3,280.20 × 1,311.55
  4. Step 4: Simplify right side
    2,192.29x = 4,302,146.31
  5. Step 5: Solve for x
    x = 4,302,146.31/2,192.29
  6. Step 6: Final answer
    x = 1,962.40

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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.