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Finding the Fourth Proportional to 319.50, 440.04 and 303.84

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Solution

The fourth proportional to 319.50, 440.04 and 303.84 is: 418.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.50 : 440.04 = 303.84 : x
  2. Step 2: Convert to fraction form
    319.50/440.04 = 303.84/x
  3. Step 3: Cross multiply
    319.50x = 440.04 × 303.84
  4. Step 4: Simplify right side
    319.50x = 133,701.75
  5. Step 5: Solve for x
    x = 133,701.75/319.50
  6. Step 6: Final answer
    x = 418.47

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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.