Home / 1,282.20-1,919.70-1,246.20

Finding the Fourth Proportional to 1,282.20, 1,919.70 and 1,246.20

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Solution

The fourth proportional to 1,282.20, 1,919.70 and 1,246.20 is: 1,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.20 : 1,919.70 = 1,246.20 : x
  2. Step 2: Convert to fraction form
    1,282.20/1,919.70 = 1,246.20/x
  3. Step 3: Cross multiply
    1,282.20x = 1,919.70 × 1,246.20
  4. Step 4: Simplify right side
    1,282.20x = 2,392,330.14
  5. Step 5: Solve for x
    x = 2,392,330.14/1,282.20
  6. Step 6: Final answer
    x = 1,865.80

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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.