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Finding the Fourth Proportional to 1,163.82, 1,606.08 and 639.86

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Solution

The fourth proportional to 1,163.82, 1,606.08 and 639.86 is: 883.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.82 : 1,606.08 = 639.86 : x
  2. Step 2: Convert to fraction form
    1,163.82/1,606.08 = 639.86/x
  3. Step 3: Cross multiply
    1,163.82x = 1,606.08 × 639.86
  4. Step 4: Simplify right side
    1,163.82x = 1,027,658.32
  5. Step 5: Solve for x
    x = 1,027,658.32/1,163.82
  6. Step 6: Final answer
    x = 883.00

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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.