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Finding the Fourth Proportional to 808.98, 1,116.50 and 494.34

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Solution

The fourth proportional to 808.98, 1,116.50 and 494.34 is: 682.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.98 : 1,116.50 = 494.34 : x
  2. Step 2: Convert to fraction form
    808.98/1,116.50 = 494.34/x
  3. Step 3: Cross multiply
    808.98x = 1,116.50 × 494.34
  4. Step 4: Simplify right side
    808.98x = 551,930.61
  5. Step 5: Solve for x
    x = 551,930.61/808.98
  6. Step 6: Final answer
    x = 682.25

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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.