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Finding the Fourth Proportional to 1,181.88, 1,630.91 and 650.66

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Solution

The fourth proportional to 1,181.88, 1,630.91 and 650.66 is: 897.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.88 : 1,630.91 = 650.66 : x
  2. Step 2: Convert to fraction form
    1,181.88/1,630.91 = 650.66/x
  3. Step 3: Cross multiply
    1,181.88x = 1,630.91 × 650.66
  4. Step 4: Simplify right side
    1,181.88x = 1,061,159.75
  5. Step 5: Solve for x
    x = 1,061,159.75/1,181.88
  6. Step 6: Final answer
    x = 897.86

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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.