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Finding the Fourth Proportional to 808.73, 1,115.07 and 676.13

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Solution

The fourth proportional to 808.73, 1,115.07 and 676.13 is: 932.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.73 : 1,115.07 = 676.13 : x
  2. Step 2: Convert to fraction form
    808.73/1,115.07 = 676.13/x
  3. Step 3: Cross multiply
    808.73x = 1,115.07 × 676.13
  4. Step 4: Simplify right side
    808.73x = 753,932.28
  5. Step 5: Solve for x
    x = 753,932.28/808.73
  6. Step 6: Final answer
    x = 932.24

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Double scale
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1.5x scale

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.