Home / 1,280.73-1,921.16-587.09

Finding the Fourth Proportional to 1,280.73, 1,921.16 and 587.09

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Solution

The fourth proportional to 1,280.73, 1,921.16 and 587.09 is: 880.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.73 : 1,921.16 = 587.09 : x
  2. Step 2: Convert to fraction form
    1,280.73/1,921.16 = 587.09/x
  3. Step 3: Cross multiply
    1,280.73x = 1,921.16 × 587.09
  4. Step 4: Simplify right side
    1,280.73x = 1,127,890.61
  5. Step 5: Solve for x
    x = 1,127,890.61/1,280.73
  6. Step 6: Final answer
    x = 880.66

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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.