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Finding the Fourth Proportional to 2,699.40, 3,725.40 and 1,520.70

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Solution

The fourth proportional to 2,699.40, 3,725.40 and 1,520.70 is: 2,098.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,699.40 : 3,725.40 = 1,520.70 : x
  2. Step 2: Convert to fraction form
    2,699.40/3,725.40 = 1,520.70/x
  3. Step 3: Cross multiply
    2,699.40x = 3,725.40 × 1,520.70
  4. Step 4: Simplify right side
    2,699.40x = 5,665,215.78
  5. Step 5: Solve for x
    x = 5,665,215.78/2,699.40
  6. Step 6: Final answer
    x = 2,098.69

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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.