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Finding the Fourth Proportional to 319.57, 479.50 and 157.23

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Solution

The fourth proportional to 319.57, 479.50 and 157.23 is: 235.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.57 : 479.50 = 157.23 : x
  2. Step 2: Convert to fraction form
    319.57/479.50 = 157.23/x
  3. Step 3: Cross multiply
    319.57x = 479.50 × 157.23
  4. Step 4: Simplify right side
    319.57x = 75,391.39
  5. Step 5: Solve for x
    x = 75,391.39/319.57
  6. Step 6: Final answer
    x = 235.92

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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.