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Finding the Fourth Proportional to 2,805.56, 3,878.88 and 2,683.16

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Solution

The fourth proportional to 2,805.56, 3,878.88 and 2,683.16 is: 3,709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.56 : 3,878.88 = 2,683.16 : x
  2. Step 2: Convert to fraction form
    2,805.56/3,878.88 = 2,683.16/x
  3. Step 3: Cross multiply
    2,805.56x = 3,878.88 × 2,683.16
  4. Step 4: Simplify right side
    2,805.56x = 10,407,655.66
  5. Step 5: Solve for x
    x = 10,407,655.66/2,805.56
  6. Step 6: Final answer
    x = 3,709.65

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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.