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Finding the Fourth Proportional to 1,181.07, 1,771.80 and 633.10

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Solution

The fourth proportional to 1,181.07, 1,771.80 and 633.10 is: 949.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.07 : 1,771.80 = 633.10 : x
  2. Step 2: Convert to fraction form
    1,181.07/1,771.80 = 633.10/x
  3. Step 3: Cross multiply
    1,181.07x = 1,771.80 × 633.10
  4. Step 4: Simplify right side
    1,181.07x = 1,121,726.58
  5. Step 5: Solve for x
    x = 1,121,726.58/1,181.07
  6. Step 6: Final answer
    x = 949.75

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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.