Home / 1,266.50-1,747.95-1,211.15

Finding the Fourth Proportional to 1,266.50, 1,747.95 and 1,211.15

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Solution

The fourth proportional to 1,266.50, 1,747.95 and 1,211.15 is: 1,671.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.50 : 1,747.95 = 1,211.15 : x
  2. Step 2: Convert to fraction form
    1,266.50/1,747.95 = 1,211.15/x
  3. Step 3: Cross multiply
    1,266.50x = 1,747.95 × 1,211.15
  4. Step 4: Simplify right side
    1,266.50x = 2,117,029.64
  5. Step 5: Solve for x
    x = 2,117,029.64/1,266.50
  6. Step 6: Final answer
    x = 1,671.56

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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.