Home / 1,311.18-1,810.52-1,171.05

Finding the Fourth Proportional to 1,311.18, 1,810.52 and 1,171.05

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Solution

The fourth proportional to 1,311.18, 1,810.52 and 1,171.05 is: 1,617.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.18 : 1,810.52 = 1,171.05 : x
  2. Step 2: Convert to fraction form
    1,311.18/1,810.52 = 1,171.05/x
  3. Step 3: Cross multiply
    1,311.18x = 1,810.52 × 1,171.05
  4. Step 4: Simplify right side
    1,311.18x = 2,120,209.45
  5. Step 5: Solve for x
    x = 2,120,209.45/1,311.18
  6. Step 6: Final answer
    x = 1,617.02

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.