Home / 1,280.07-1,911.30-1,147.41

Finding the Fourth Proportional to 1,280.07, 1,911.30 and 1,147.41

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Solution

The fourth proportional to 1,280.07, 1,911.30 and 1,147.41 is: 1,713.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.07 : 1,911.30 = 1,147.41 : x
  2. Step 2: Convert to fraction form
    1,280.07/1,911.30 = 1,147.41/x
  3. Step 3: Cross multiply
    1,280.07x = 1,911.30 × 1,147.41
  4. Step 4: Simplify right side
    1,280.07x = 2,193,044.73
  5. Step 5: Solve for x
    x = 2,193,044.73/1,280.07
  6. Step 6: Final answer
    x = 1,713.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.