Home / 1,943.12-2,911.80-1,171.28

Finding the Fourth Proportional to 1,943.12, 2,911.80 and 1,171.28

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Solution

The fourth proportional to 1,943.12, 2,911.80 and 1,171.28 is: 1,755.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.12 : 2,911.80 = 1,171.28 : x
  2. Step 2: Convert to fraction form
    1,943.12/2,911.80 = 1,171.28/x
  3. Step 3: Cross multiply
    1,943.12x = 2,911.80 × 1,171.28
  4. Step 4: Simplify right side
    1,943.12x = 3,410,533.10
  5. Step 5: Solve for x
    x = 3,410,533.10/1,943.12
  6. Step 6: Final answer
    x = 1,755.18

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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.