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Finding the Fourth Proportional to 2,608.10, 3,912.19 and 876.74

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Solution

The fourth proportional to 2,608.10, 3,912.19 and 876.74 is: 1,315.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,608.10 : 3,912.19 = 876.74 : x
  2. Step 2: Convert to fraction form
    2,608.10/3,912.19 = 876.74/x
  3. Step 3: Cross multiply
    2,608.10x = 3,912.19 × 876.74
  4. Step 4: Simplify right side
    2,608.10x = 3,429,973.46
  5. Step 5: Solve for x
    x = 3,429,973.46/2,608.10
  6. Step 6: Final answer
    x = 1,315.12

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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.