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Finding the Fourth Proportional to 363.99, 501.93 and 311.70

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Solution

The fourth proportional to 363.99, 501.93 and 311.70 is: 429.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.99 : 501.93 = 311.70 : x
  2. Step 2: Convert to fraction form
    363.99/501.93 = 311.70/x
  3. Step 3: Cross multiply
    363.99x = 501.93 × 311.70
  4. Step 4: Simplify right side
    363.99x = 156,451.58
  5. Step 5: Solve for x
    x = 156,451.58/363.99
  6. Step 6: Final answer
    x = 429.82

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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.