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Finding the Fourth Proportional to 3,791.78, 5,232.62 and 2,113.19

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Solution

The fourth proportional to 3,791.78, 5,232.62 and 2,113.19 is: 2,916.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,791.78 : 5,232.62 = 2,113.19 : x
  2. Step 2: Convert to fraction form
    3,791.78/5,232.62 = 2,113.19/x
  3. Step 3: Cross multiply
    3,791.78x = 5,232.62 × 2,113.19
  4. Step 4: Simplify right side
    3,791.78x = 11,057,483.53
  5. Step 5: Solve for x
    x = 11,057,483.53/3,791.78
  6. Step 6: Final answer
    x = 2,916.17

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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.