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Finding the Fourth Proportional to 292.71, 403.94 and 161.72

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Solution

The fourth proportional to 292.71, 403.94 and 161.72 is: 223.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.71 : 403.94 = 161.72 : x
  2. Step 2: Convert to fraction form
    292.71/403.94 = 161.72/x
  3. Step 3: Cross multiply
    292.71x = 403.94 × 161.72
  4. Step 4: Simplify right side
    292.71x = 65,325.08
  5. Step 5: Solve for x
    x = 65,325.08/292.71
  6. Step 6: Final answer
    x = 223.17

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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.