Home / 1,211.17-1,816.92-1,206.72

Finding the Fourth Proportional to 1,211.17, 1,816.92 and 1,206.72

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Solution

The fourth proportional to 1,211.17, 1,816.92 and 1,206.72 is: 1,810.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.17 : 1,816.92 = 1,206.72 : x
  2. Step 2: Convert to fraction form
    1,211.17/1,816.92 = 1,206.72/x
  3. Step 3: Cross multiply
    1,211.17x = 1,816.92 × 1,206.72
  4. Step 4: Simplify right side
    1,211.17x = 2,192,517.12
  5. Step 5: Solve for x
    x = 2,192,517.12/1,211.17
  6. Step 6: Final answer
    x = 1,810.25

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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.