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Finding the Fourth Proportional to 1,144.31, 1,579.69 and 766.85

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Solution

The fourth proportional to 1,144.31, 1,579.69 and 766.85 is: 1,058.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.31 : 1,579.69 = 766.85 : x
  2. Step 2: Convert to fraction form
    1,144.31/1,579.69 = 766.85/x
  3. Step 3: Cross multiply
    1,144.31x = 1,579.69 × 766.85
  4. Step 4: Simplify right side
    1,144.31x = 1,211,385.28
  5. Step 5: Solve for x
    x = 1,211,385.28/1,144.31
  6. Step 6: Final answer
    x = 1,058.62

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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.