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Finding the Fourth Proportional to 292.31, 403.40 and 161.32

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Solution

The fourth proportional to 292.31, 403.40 and 161.32 is: 222.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.31 : 403.40 = 161.32 : x
  2. Step 2: Convert to fraction form
    292.31/403.40 = 161.32/x
  3. Step 3: Cross multiply
    292.31x = 403.40 × 161.32
  4. Step 4: Simplify right side
    292.31x = 65,075.88
  5. Step 5: Solve for x
    x = 65,075.88/292.31
  6. Step 6: Final answer
    x = 222.62

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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.