Home / 1,280.24-1,919.43-499.60

Finding the Fourth Proportional to 1,280.24, 1,919.43 and 499.60

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Solution

The fourth proportional to 1,280.24, 1,919.43 and 499.60 is: 749.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.24 : 1,919.43 = 499.60 : x
  2. Step 2: Convert to fraction form
    1,280.24/1,919.43 = 499.60/x
  3. Step 3: Cross multiply
    1,280.24x = 1,919.43 × 499.60
  4. Step 4: Simplify right side
    1,280.24x = 958,949.63
  5. Step 5: Solve for x
    x = 958,949.63/1,280.24
  6. Step 6: Final answer
    x = 749.04

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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.