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Finding the Fourth Proportional to 1,163.92, 1,606.22 and 715.66

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Solution

The fourth proportional to 1,163.92, 1,606.22 and 715.66 is: 987.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.92 : 1,606.22 = 715.66 : x
  2. Step 2: Convert to fraction form
    1,163.92/1,606.22 = 715.66/x
  3. Step 3: Cross multiply
    1,163.92x = 1,606.22 × 715.66
  4. Step 4: Simplify right side
    1,163.92x = 1,149,507.41
  5. Step 5: Solve for x
    x = 1,149,507.41/1,163.92
  6. Step 6: Final answer
    x = 987.62

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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.