Home / 1,991.10-2,746.32-1,618.08

Finding the Fourth Proportional to 1,991.10, 2,746.32 and 1,618.08

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Solution

The fourth proportional to 1,991.10, 2,746.32 and 1,618.08 is: 2,231.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.10 : 2,746.32 = 1,618.08 : x
  2. Step 2: Convert to fraction form
    1,991.10/2,746.32 = 1,618.08/x
  3. Step 3: Cross multiply
    1,991.10x = 2,746.32 × 1,618.08
  4. Step 4: Simplify right side
    1,991.10x = 4,443,765.47
  5. Step 5: Solve for x
    x = 4,443,765.47/1,991.10
  6. Step 6: Final answer
    x = 2,231.81

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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.