Home / 1,770.98-2,660.26-1,311.72

Finding the Fourth Proportional to 1,770.98, 2,660.26 and 1,311.72

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Solution

The fourth proportional to 1,770.98, 2,660.26 and 1,311.72 is: 1,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.98 : 2,660.26 = 1,311.72 : x
  2. Step 2: Convert to fraction form
    1,770.98/2,660.26 = 1,311.72/x
  3. Step 3: Cross multiply
    1,770.98x = 2,660.26 × 1,311.72
  4. Step 4: Simplify right side
    1,770.98x = 3,489,516.25
  5. Step 5: Solve for x
    x = 3,489,516.25/1,770.98
  6. Step 6: Final answer
    x = 1,970.39

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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.