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Finding the Fourth Proportional to 4,811.70, 6,640.56 and 2,687.70

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Solution

The fourth proportional to 4,811.70, 6,640.56 and 2,687.70 is: 3,709.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,811.70 : 6,640.56 = 2,687.70 : x
  2. Step 2: Convert to fraction form
    4,811.70/6,640.56 = 2,687.70/x
  3. Step 3: Cross multiply
    4,811.70x = 6,640.56 × 2,687.70
  4. Step 4: Simplify right side
    4,811.70x = 17,847,833.11
  5. Step 5: Solve for x
    x = 17,847,833.11/4,811.70
  6. Step 6: Final answer
    x = 3,709.26

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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.