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Finding the Fourth Proportional to 502.60, 753.90 and 329.80

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Solution

The fourth proportional to 502.60, 753.90 and 329.80 is: 494.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.60 : 753.90 = 329.80 : x
  2. Step 2: Convert to fraction form
    502.60/753.90 = 329.80/x
  3. Step 3: Cross multiply
    502.60x = 753.90 × 329.80
  4. Step 4: Simplify right side
    502.60x = 248,636.22
  5. Step 5: Solve for x
    x = 248,636.22/502.60
  6. Step 6: Final answer
    x = 494.70

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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.