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Finding the Fourth Proportional to 255.26, 352.28 and 157

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Solution

The fourth proportional to 255.26, 352.28 and 157 is: 216.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.26 : 352.28 = 157 : x
  2. Step 2: Convert to fraction form
    255.26/352.28 = 157/x
  3. Step 3: Cross multiply
    255.26x = 352.28 × 157
  4. Step 4: Simplify right side
    255.26x = 55,307.96
  5. Step 5: Solve for x
    x = 55,307.96/255.26
  6. Step 6: Final answer
    x = 216.67

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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.