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Finding the Fourth Proportional to 808.44, 1,115.91 and 476.75

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Solution

The fourth proportional to 808.44, 1,115.91 and 476.75 is: 658.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.44 : 1,115.91 = 476.75 : x
  2. Step 2: Convert to fraction form
    808.44/1,115.91 = 476.75/x
  3. Step 3: Cross multiply
    808.44x = 1,115.91 × 476.75
  4. Step 4: Simplify right side
    808.44x = 532,004.51
  5. Step 5: Solve for x
    x = 532,004.51/808.44
  6. Step 6: Final answer
    x = 658.06

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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.