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Finding the Fourth Proportional to 292.16, 403.20 and 161.18

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Solution

The fourth proportional to 292.16, 403.20 and 161.18 is: 222.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.16 : 403.20 = 161.18 : x
  2. Step 2: Convert to fraction form
    292.16/403.20 = 161.18/x
  3. Step 3: Cross multiply
    292.16x = 403.20 × 161.18
  4. Step 4: Simplify right side
    292.16x = 64,987.78
  5. Step 5: Solve for x
    x = 64,987.78/292.16
  6. Step 6: Final answer
    x = 222.44

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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.