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Finding the Fourth Proportional to 1,677.11, 2,514.11 and 636.80

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Solution

The fourth proportional to 1,677.11, 2,514.11 and 636.80 is: 954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.11 : 2,514.11 = 636.80 : x
  2. Step 2: Convert to fraction form
    1,677.11/2,514.11 = 636.80/x
  3. Step 3: Cross multiply
    1,677.11x = 2,514.11 × 636.80
  4. Step 4: Simplify right side
    1,677.11x = 1,600,969.49
  5. Step 5: Solve for x
    x = 1,600,969.49/1,677.11
  6. Step 6: Final answer
    x = 954.60

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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.