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Finding the Fourth Proportional to 227.58, 313.90 and 157.65

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Solution

The fourth proportional to 227.58, 313.90 and 157.65 is: 217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.58 : 313.90 = 157.65 : x
  2. Step 2: Convert to fraction form
    227.58/313.90 = 157.65/x
  3. Step 3: Cross multiply
    227.58x = 313.90 × 157.65
  4. Step 4: Simplify right side
    227.58x = 49,486.34
  5. Step 5: Solve for x
    x = 49,486.34/227.58
  6. Step 6: Final answer
    x = 217.45

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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.