Home / 1,280.65-1,919.45-548.68

Finding the Fourth Proportional to 1,280.65, 1,919.45 and 548.68

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Solution

The fourth proportional to 1,280.65, 1,919.45 and 548.68 is: 822.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.65 : 1,919.45 = 548.68 : x
  2. Step 2: Convert to fraction form
    1,280.65/1,919.45 = 548.68/x
  3. Step 3: Cross multiply
    1,280.65x = 1,919.45 × 548.68
  4. Step 4: Simplify right side
    1,280.65x = 1,053,160.40
  5. Step 5: Solve for x
    x = 1,053,160.40/1,280.65
  6. Step 6: Final answer
    x = 822.37

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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.