Home / 1,280.63-1,921.24-414.94

Finding the Fourth Proportional to 1,280.63, 1,921.24 and 414.94

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Solution

The fourth proportional to 1,280.63, 1,921.24 and 414.94 is: 622.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.63 : 1,921.24 = 414.94 : x
  2. Step 2: Convert to fraction form
    1,280.63/1,921.24 = 414.94/x
  3. Step 3: Cross multiply
    1,280.63x = 1,921.24 × 414.94
  4. Step 4: Simplify right side
    1,280.63x = 797,195.04
  5. Step 5: Solve for x
    x = 797,195.04/1,280.63
  6. Step 6: Final answer
    x = 622.50

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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.