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Finding the Fourth Proportional to 292.05, 438.20 and 161.89

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Solution

The fourth proportional to 292.05, 438.20 and 161.89 is: 242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.05 : 438.20 = 161.89 : x
  2. Step 2: Convert to fraction form
    292.05/438.20 = 161.89/x
  3. Step 3: Cross multiply
    292.05x = 438.20 × 161.89
  4. Step 4: Simplify right side
    292.05x = 70,941.82
  5. Step 5: Solve for x
    x = 70,941.82/292.05
  6. Step 6: Final answer
    x = 242.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.