Home / 1,280.93-1,921.44-415.25

Finding the Fourth Proportional to 1,280.93, 1,921.44 and 415.25

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Solution

The fourth proportional to 1,280.93, 1,921.44 and 415.25 is: 622.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.93 : 1,921.44 = 415.25 : x
  2. Step 2: Convert to fraction form
    1,280.93/1,921.44 = 415.25/x
  3. Step 3: Cross multiply
    1,280.93x = 1,921.44 × 415.25
  4. Step 4: Simplify right side
    1,280.93x = 797,877.96
  5. Step 5: Solve for x
    x = 797,877.96/1,280.93
  6. Step 6: Final answer
    x = 622.89

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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.