Home / 1,280.73-1,919.89-1,166.60

Finding the Fourth Proportional to 1,280.73, 1,919.89 and 1,166.60

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Solution

The fourth proportional to 1,280.73, 1,919.89 and 1,166.60 is: 1,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.73 : 1,919.89 = 1,166.60 : x
  2. Step 2: Convert to fraction form
    1,280.73/1,919.89 = 1,166.60/x
  3. Step 3: Cross multiply
    1,280.73x = 1,919.89 × 1,166.60
  4. Step 4: Simplify right side
    1,280.73x = 2,239,743.67
  5. Step 5: Solve for x
    x = 2,239,743.67/1,280.73
  6. Step 6: Final answer
    x = 1,748.80

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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.