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Finding the Fourth Proportional to 315.29, 472.37 and 199.46

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Solution

The fourth proportional to 315.29, 472.37 and 199.46 is: 298.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.29 : 472.37 = 199.46 : x
  2. Step 2: Convert to fraction form
    315.29/472.37 = 199.46/x
  3. Step 3: Cross multiply
    315.29x = 472.37 × 199.46
  4. Step 4: Simplify right side
    315.29x = 94,219.10
  5. Step 5: Solve for x
    x = 94,219.10/315.29
  6. Step 6: Final answer
    x = 298.83

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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.