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Finding the Fourth Proportional to 1,049.20, 1,447.80 and 607.09

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Solution

The fourth proportional to 1,049.20, 1,447.80 and 607.09 is: 837.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.20 : 1,447.80 = 607.09 : x
  2. Step 2: Convert to fraction form
    1,049.20/1,447.80 = 607.09/x
  3. Step 3: Cross multiply
    1,049.20x = 1,447.80 × 607.09
  4. Step 4: Simplify right side
    1,049.20x = 878,944.90
  5. Step 5: Solve for x
    x = 878,944.90/1,049.20
  6. Step 6: Final answer
    x = 837.73

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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.