Home / 1,217.80-1,816.67-1,126

Finding the Fourth Proportional to 1,217.80, 1,816.67 and 1,126

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Solution

The fourth proportional to 1,217.80, 1,816.67 and 1,126 is: 1,679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.80 : 1,816.67 = 1,126 : x
  2. Step 2: Convert to fraction form
    1,217.80/1,816.67 = 1,126/x
  3. Step 3: Cross multiply
    1,217.80x = 1,816.67 × 1,126
  4. Step 4: Simplify right side
    1,217.80x = 2,045,570.42
  5. Step 5: Solve for x
    x = 2,045,570.42/1,217.80
  6. Step 6: Final answer
    x = 1,679.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.