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Finding the Fourth Proportional to 363.49, 501.24 and 311.20

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Solution

The fourth proportional to 363.49, 501.24 and 311.20 is: 429.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.49 : 501.24 = 311.20 : x
  2. Step 2: Convert to fraction form
    363.49/501.24 = 311.20/x
  3. Step 3: Cross multiply
    363.49x = 501.24 × 311.20
  4. Step 4: Simplify right side
    363.49x = 155,985.89
  5. Step 5: Solve for x
    x = 155,985.89/363.49
  6. Step 6: Final answer
    x = 429.13

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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.