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Finding the Fourth Proportional to 3,640.54, 5,460.81 and 1,330.78

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Solution

The fourth proportional to 3,640.54, 5,460.81 and 1,330.78 is: 1,996.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.54 : 5,460.81 = 1,330.78 : x
  2. Step 2: Convert to fraction form
    3,640.54/5,460.81 = 1,330.78/x
  3. Step 3: Cross multiply
    3,640.54x = 5,460.81 × 1,330.78
  4. Step 4: Simplify right side
    3,640.54x = 7,267,136.73
  5. Step 5: Solve for x
    x = 7,267,136.73/3,640.54
  6. Step 6: Final answer
    x = 1,996.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.