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Finding the Fourth Proportional to 2,715.57, 3,747.89 and 1,720.94

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Solution

The fourth proportional to 2,715.57, 3,747.89 and 1,720.94 is: 2,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.57 : 3,747.89 = 1,720.94 : x
  2. Step 2: Convert to fraction form
    2,715.57/3,747.89 = 1,720.94/x
  3. Step 3: Cross multiply
    2,715.57x = 3,747.89 × 1,720.94
  4. Step 4: Simplify right side
    2,715.57x = 6,449,893.82
  5. Step 5: Solve for x
    x = 6,449,893.82/2,715.57
  6. Step 6: Final answer
    x = 2,375.15

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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.