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Finding the Fourth Proportional to 329.60, 494.40 and 124.20

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Solution

The fourth proportional to 329.60, 494.40 and 124.20 is: 186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.60 : 494.40 = 124.20 : x
  2. Step 2: Convert to fraction form
    329.60/494.40 = 124.20/x
  3. Step 3: Cross multiply
    329.60x = 494.40 × 124.20
  4. Step 4: Simplify right side
    329.60x = 61,404.48
  5. Step 5: Solve for x
    x = 61,404.48/329.60
  6. Step 6: Final answer
    x = 186.30

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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.