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Finding the Fourth Proportional to 351.09, 526.87 and 131.72

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Solution

The fourth proportional to 351.09, 526.87 and 131.72 is: 197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.09 : 526.87 = 131.72 : x
  2. Step 2: Convert to fraction form
    351.09/526.87 = 131.72/x
  3. Step 3: Cross multiply
    351.09x = 526.87 × 131.72
  4. Step 4: Simplify right side
    351.09x = 69,399.32
  5. Step 5: Solve for x
    x = 69,399.32/351.09
  6. Step 6: Final answer
    x = 197.67

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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.