Home / 2,113.20-3,170.04-815.04

Finding the Fourth Proportional to 2,113.20, 3,170.04 and 815.04

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Solution

The fourth proportional to 2,113.20, 3,170.04 and 815.04 is: 1,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.20 : 3,170.04 = 815.04 : x
  2. Step 2: Convert to fraction form
    2,113.20/3,170.04 = 815.04/x
  3. Step 3: Cross multiply
    2,113.20x = 3,170.04 × 815.04
  4. Step 4: Simplify right side
    2,113.20x = 2,583,709.40
  5. Step 5: Solve for x
    x = 2,583,709.40/2,113.20
  6. Step 6: Final answer
    x = 1,222.65

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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.