Home / 1,310.49-1,966.20-660.73

Finding the Fourth Proportional to 1,310.49, 1,966.20 and 660.73

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Solution

The fourth proportional to 1,310.49, 1,966.20 and 660.73 is: 991.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.49 : 1,966.20 = 660.73 : x
  2. Step 2: Convert to fraction form
    1,310.49/1,966.20 = 660.73/x
  3. Step 3: Cross multiply
    1,310.49x = 1,966.20 × 660.73
  4. Step 4: Simplify right side
    1,310.49x = 1,299,131.02
  5. Step 5: Solve for x
    x = 1,299,131.02/1,310.49
  6. Step 6: Final answer
    x = 991.34

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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.