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Finding the Fourth Proportional to 255.70, 352.50 and 157.39

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Solution

The fourth proportional to 255.70, 352.50 and 157.39 is: 216.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.70 : 352.50 = 157.39 : x
  2. Step 2: Convert to fraction form
    255.70/352.50 = 157.39/x
  3. Step 3: Cross multiply
    255.70x = 352.50 × 157.39
  4. Step 4: Simplify right side
    255.70x = 55,479.98
  5. Step 5: Solve for x
    x = 55,479.98/255.70
  6. Step 6: Final answer
    x = 216.97

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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.