Home / 1,331.14-1,995.20-680.50

Finding the Fourth Proportional to 1,331.14, 1,995.20 and 680.50

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Solution

The fourth proportional to 1,331.14, 1,995.20 and 680.50 is: 1,019.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.14 : 1,995.20 = 680.50 : x
  2. Step 2: Convert to fraction form
    1,331.14/1,995.20 = 680.50/x
  3. Step 3: Cross multiply
    1,331.14x = 1,995.20 × 680.50
  4. Step 4: Simplify right side
    1,331.14x = 1,357,733.60
  5. Step 5: Solve for x
    x = 1,357,733.60/1,331.14
  6. Step 6: Final answer
    x = 1,019.98

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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.