Home / 1,281.10-1,917.60-1,240.60

Finding the Fourth Proportional to 1,281.10, 1,917.60 and 1,240.60

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Solution

The fourth proportional to 1,281.10, 1,917.60 and 1,240.60 is: 1,856.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.10 : 1,917.60 = 1,240.60 : x
  2. Step 2: Convert to fraction form
    1,281.10/1,917.60 = 1,240.60/x
  3. Step 3: Cross multiply
    1,281.10x = 1,917.60 × 1,240.60
  4. Step 4: Simplify right side
    1,281.10x = 2,378,974.56
  5. Step 5: Solve for x
    x = 2,378,974.56/1,281.10
  6. Step 6: Final answer
    x = 1,856.98

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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.