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Finding the Fourth Proportional to 808.88, 1,116.20 and 459.50

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Solution

The fourth proportional to 808.88, 1,116.20 and 459.50 is: 634.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.88 : 1,116.20 = 459.50 : x
  2. Step 2: Convert to fraction form
    808.88/1,116.20 = 459.50/x
  3. Step 3: Cross multiply
    808.88x = 1,116.20 × 459.50
  4. Step 4: Simplify right side
    808.88x = 512,891.60
  5. Step 5: Solve for x
    x = 512,891.60/808.88
  6. Step 6: Final answer
    x = 634.08

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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.