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Finding the Fourth Proportional to 1,163.82, 1,605.88 and 666.34

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Solution

The fourth proportional to 1,163.82, 1,605.88 and 666.34 is: 919.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.82 : 1,605.88 = 666.34 : x
  2. Step 2: Convert to fraction form
    1,163.82/1,605.88 = 666.34/x
  3. Step 3: Cross multiply
    1,163.82x = 1,605.88 × 666.34
  4. Step 4: Simplify right side
    1,163.82x = 1,070,062.08
  5. Step 5: Solve for x
    x = 1,070,062.08/1,163.82
  6. Step 6: Final answer
    x = 919.44

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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.