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Finding the Fourth Proportional to 2,817.75, 3,888.39 and 1,558.78

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Solution

The fourth proportional to 2,817.75, 3,888.39 and 1,558.78 is: 2,151.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.75 : 3,888.39 = 1,558.78 : x
  2. Step 2: Convert to fraction form
    2,817.75/3,888.39 = 1,558.78/x
  3. Step 3: Cross multiply
    2,817.75x = 3,888.39 × 1,558.78
  4. Step 4: Simplify right side
    2,817.75x = 6,061,144.56
  5. Step 5: Solve for x
    x = 6,061,144.56/2,817.75
  6. Step 6: Final answer
    x = 2,151.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.