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Finding the Fourth Proportional to 1,280.03, 1,765.49 and 881.82

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Solution

The fourth proportional to 1,280.03, 1,765.49 and 881.82 is: 1,216.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.03 : 1,765.49 = 881.82 : x
  2. Step 2: Convert to fraction form
    1,280.03/1,765.49 = 881.82/x
  3. Step 3: Cross multiply
    1,280.03x = 1,765.49 × 881.82
  4. Step 4: Simplify right side
    1,280.03x = 1,556,846.60
  5. Step 5: Solve for x
    x = 1,556,846.60/1,280.03
  6. Step 6: Final answer
    x = 1,216.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.