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Finding the Fourth Proportional to 1,181.21, 1,771.74 and 450.45

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Solution

The fourth proportional to 1,181.21, 1,771.74 and 450.45 is: 675.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.21 : 1,771.74 = 450.45 : x
  2. Step 2: Convert to fraction form
    1,181.21/1,771.74 = 450.45/x
  3. Step 3: Cross multiply
    1,181.21x = 1,771.74 × 450.45
  4. Step 4: Simplify right side
    1,181.21x = 798,080.28
  5. Step 5: Solve for x
    x = 798,080.28/1,181.21
  6. Step 6: Final answer
    x = 675.65

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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.