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Finding the Fourth Proportional to 4,885.87, 6,742.56 and 2,647.78

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Solution

The fourth proportional to 4,885.87, 6,742.56 and 2,647.78 is: 3,653.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,885.87 : 6,742.56 = 2,647.78 : x
  2. Step 2: Convert to fraction form
    4,885.87/6,742.56 = 2,647.78/x
  3. Step 3: Cross multiply
    4,885.87x = 6,742.56 × 2,647.78
  4. Step 4: Simplify right side
    4,885.87x = 17,852,815.52
  5. Step 5: Solve for x
    x = 17,852,815.52/4,885.87
  6. Step 6: Final answer
    x = 3,653.97

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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.