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Finding the Fourth Proportional to 808.18, 1,212.26 and 534.20

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Solution

The fourth proportional to 808.18, 1,212.26 and 534.20 is: 801.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.18 : 1,212.26 = 534.20 : x
  2. Step 2: Convert to fraction form
    808.18/1,212.26 = 534.20/x
  3. Step 3: Cross multiply
    808.18x = 1,212.26 × 534.20
  4. Step 4: Simplify right side
    808.18x = 647,589.29
  5. Step 5: Solve for x
    x = 647,589.29/808.18
  6. Step 6: Final answer
    x = 801.29

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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.