Home / 3,640.05-5,459.81-1,299.78

Finding the Fourth Proportional to 3,640.05, 5,459.81 and 1,299.78

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Solution

The fourth proportional to 3,640.05, 5,459.81 and 1,299.78 is: 1,949.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.05 : 5,459.81 = 1,299.78 : x
  2. Step 2: Convert to fraction form
    3,640.05/5,459.81 = 1,299.78/x
  3. Step 3: Cross multiply
    3,640.05x = 5,459.81 × 1,299.78
  4. Step 4: Simplify right side
    3,640.05x = 7,096,545.34
  5. Step 5: Solve for x
    x = 7,096,545.34/3,640.05
  6. Step 6: Final answer
    x = 1,949.57

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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.