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Finding the Fourth Proportional to 319.15, 478.71 and 190.04

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Solution

The fourth proportional to 319.15, 478.71 and 190.04 is: 285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.15 : 478.71 = 190.04 : x
  2. Step 2: Convert to fraction form
    319.15/478.71 = 190.04/x
  3. Step 3: Cross multiply
    319.15x = 478.71 × 190.04
  4. Step 4: Simplify right side
    319.15x = 90,974.05
  5. Step 5: Solve for x
    x = 90,974.05/319.15
  6. Step 6: Final answer
    x = 285.05

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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.