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Finding the Fourth Proportional to 3,751.87, 5,171.89 and 2,490.70

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Solution

The fourth proportional to 3,751.87, 5,171.89 and 2,490.70 is: 3,433.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,751.87 : 5,171.89 = 2,490.70 : x
  2. Step 2: Convert to fraction form
    3,751.87/5,171.89 = 2,490.70/x
  3. Step 3: Cross multiply
    3,751.87x = 5,171.89 × 2,490.70
  4. Step 4: Simplify right side
    3,751.87x = 12,881,588.11
  5. Step 5: Solve for x
    x = 12,881,588.11/3,751.87
  6. Step 6: Final answer
    x = 3,433.38

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Double scale
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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.