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Finding the Fourth Proportional to 308.86, 429.22 and 304.99

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Solution

The fourth proportional to 308.86, 429.22 and 304.99 is: 423.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.86 : 429.22 = 304.99 : x
  2. Step 2: Convert to fraction form
    308.86/429.22 = 304.99/x
  3. Step 3: Cross multiply
    308.86x = 429.22 × 304.99
  4. Step 4: Simplify right side
    308.86x = 130,909.18
  5. Step 5: Solve for x
    x = 130,909.18/308.86
  6. Step 6: Final answer
    x = 423.84

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.