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Finding the Fourth Proportional to 315.87, 435.96 and 227.49

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Solution

The fourth proportional to 315.87, 435.96 and 227.49 is: 313.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.87 : 435.96 = 227.49 : x
  2. Step 2: Convert to fraction form
    315.87/435.96 = 227.49/x
  3. Step 3: Cross multiply
    315.87x = 435.96 × 227.49
  4. Step 4: Simplify right side
    315.87x = 99,176.54
  5. Step 5: Solve for x
    x = 99,176.54/315.87
  6. Step 6: Final answer
    x = 313.98

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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.