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Finding the Fourth Proportional to 329.66, 494.60 and 156.30

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Solution

The fourth proportional to 329.66, 494.60 and 156.30 is: 234.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.66 : 494.60 = 156.30 : x
  2. Step 2: Convert to fraction form
    329.66/494.60 = 156.30/x
  3. Step 3: Cross multiply
    329.66x = 494.60 × 156.30
  4. Step 4: Simplify right side
    329.66x = 77,307.79
  5. Step 5: Solve for x
    x = 77,307.79/329.66
  6. Step 6: Final answer
    x = 234.51

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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.