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Finding the Fourth Proportional to 1,299.49, 1,793.13 and 739.97

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Solution

The fourth proportional to 1,299.49, 1,793.13 and 739.97 is: 1,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.49 : 1,793.13 = 739.97 : x
  2. Step 2: Convert to fraction form
    1,299.49/1,793.13 = 739.97/x
  3. Step 3: Cross multiply
    1,299.49x = 1,793.13 × 739.97
  4. Step 4: Simplify right side
    1,299.49x = 1,326,862.41
  5. Step 5: Solve for x
    x = 1,326,862.41/1,299.49
  6. Step 6: Final answer
    x = 1,021.07

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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.