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Finding the Fourth Proportional to 2,640.49, 3,640.12 and 1,800.11

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Solution

The fourth proportional to 2,640.49, 3,640.12 and 1,800.11 is: 2,481.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.49 : 3,640.12 = 1,800.11 : x
  2. Step 2: Convert to fraction form
    2,640.49/3,640.12 = 1,800.11/x
  3. Step 3: Cross multiply
    2,640.49x = 3,640.12 × 1,800.11
  4. Step 4: Simplify right side
    2,640.49x = 6,552,617.64
  5. Step 5: Solve for x
    x = 6,552,617.64/2,640.49
  6. Step 6: Final answer
    x = 2,481.59

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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.