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Finding the Fourth Proportional to 2,172, 2,997.36 and 1,240.52

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Solution

The fourth proportional to 2,172, 2,997.36 and 1,240.52 is: 1,711.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172 : 2,997.36 = 1,240.52 : x
  2. Step 2: Convert to fraction form
    2,172/2,997.36 = 1,240.52/x
  3. Step 3: Cross multiply
    2,172x = 2,997.36 × 1,240.52
  4. Step 4: Simplify right side
    2,172x = 3,718,285.03
  5. Step 5: Solve for x
    x = 3,718,285.03/2,172
  6. Step 6: Final answer
    x = 1,711.92

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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.