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Finding the Fourth Proportional to 1,137.22, 1,705.89 and 965.09

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Solution

The fourth proportional to 1,137.22, 1,705.89 and 965.09 is: 1,447.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.22 : 1,705.89 = 965.09 : x
  2. Step 2: Convert to fraction form
    1,137.22/1,705.89 = 965.09/x
  3. Step 3: Cross multiply
    1,137.22x = 1,705.89 × 965.09
  4. Step 4: Simplify right side
    1,137.22x = 1,646,337.38
  5. Step 5: Solve for x
    x = 1,646,337.38/1,137.22
  6. Step 6: Final answer
    x = 1,447.69

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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.