Home / 1,280.76-1,919.07-1,232.79

Finding the Fourth Proportional to 1,280.76, 1,919.07 and 1,232.79

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Solution

The fourth proportional to 1,280.76, 1,919.07 and 1,232.79 is: 1,847.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.76 : 1,919.07 = 1,232.79 : x
  2. Step 2: Convert to fraction form
    1,280.76/1,919.07 = 1,232.79/x
  3. Step 3: Cross multiply
    1,280.76x = 1,919.07 × 1,232.79
  4. Step 4: Simplify right side
    1,280.76x = 2,365,810.31
  5. Step 5: Solve for x
    x = 2,365,810.31/1,280.76
  6. Step 6: Final answer
    x = 1,847.19

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1.5x scale

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.