Home / 2,091.30-3,138.30-1,117.68

Finding the Fourth Proportional to 2,091.30, 3,138.30 and 1,117.68

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Solution

The fourth proportional to 2,091.30, 3,138.30 and 1,117.68 is: 1,677.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.30 : 3,138.30 = 1,117.68 : x
  2. Step 2: Convert to fraction form
    2,091.30/3,138.30 = 1,117.68/x
  3. Step 3: Cross multiply
    2,091.30x = 3,138.30 × 1,117.68
  4. Step 4: Simplify right side
    2,091.30x = 3,507,615.14
  5. Step 5: Solve for x
    x = 3,507,615.14/2,091.30
  6. Step 6: Final answer
    x = 1,677.24

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.