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Finding the Fourth Proportional to 2,640.76, 3,644.09 and 1,549.67

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Solution

The fourth proportional to 2,640.76, 3,644.09 and 1,549.67 is: 2,138.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.76 : 3,644.09 = 1,549.67 : x
  2. Step 2: Convert to fraction form
    2,640.76/3,644.09 = 1,549.67/x
  3. Step 3: Cross multiply
    2,640.76x = 3,644.09 × 1,549.67
  4. Step 4: Simplify right side
    2,640.76x = 5,647,116.79
  5. Step 5: Solve for x
    x = 5,647,116.79/2,640.76
  6. Step 6: Final answer
    x = 2,138.45

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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.