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Finding the Fourth Proportional to 2,631.56, 3,947.34 and 683.72

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Solution

The fourth proportional to 2,631.56, 3,947.34 and 683.72 is: 1,025.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.56 : 3,947.34 = 683.72 : x
  2. Step 2: Convert to fraction form
    2,631.56/3,947.34 = 683.72/x
  3. Step 3: Cross multiply
    2,631.56x = 3,947.34 × 683.72
  4. Step 4: Simplify right side
    2,631.56x = 2,698,875.30
  5. Step 5: Solve for x
    x = 2,698,875.30/2,631.56
  6. Step 6: Final answer
    x = 1,025.58

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Similar ratio
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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.