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Finding the Fourth Proportional to 793.15, 1,187.36 and 709.72

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Solution

The fourth proportional to 793.15, 1,187.36 and 709.72 is: 1,062.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.15 : 1,187.36 = 709.72 : x
  2. Step 2: Convert to fraction form
    793.15/1,187.36 = 709.72/x
  3. Step 3: Cross multiply
    793.15x = 1,187.36 × 709.72
  4. Step 4: Simplify right side
    793.15x = 842,689.28
  5. Step 5: Solve for x
    x = 842,689.28/793.15
  6. Step 6: Final answer
    x = 1,062.46

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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.