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Finding the Fourth Proportional to 808.26, 1,115.25 and 476.79

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Solution

The fourth proportional to 808.26, 1,115.25 and 476.79 is: 657.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.26 : 1,115.25 = 476.79 : x
  2. Step 2: Convert to fraction form
    808.26/1,115.25 = 476.79/x
  3. Step 3: Cross multiply
    808.26x = 1,115.25 × 476.79
  4. Step 4: Simplify right side
    808.26x = 531,740.05
  5. Step 5: Solve for x
    x = 531,740.05/808.26
  6. Step 6: Final answer
    x = 657.88

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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.