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Finding the Fourth Proportional to 251.62, 346.91 and 207.20

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Solution

The fourth proportional to 251.62, 346.91 and 207.20 is: 285.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.62 : 346.91 = 207.20 : x
  2. Step 2: Convert to fraction form
    251.62/346.91 = 207.20/x
  3. Step 3: Cross multiply
    251.62x = 346.91 × 207.20
  4. Step 4: Simplify right side
    251.62x = 71,878.72
  5. Step 5: Solve for x
    x = 71,878.72/251.62
  6. Step 6: Final answer
    x = 285.67

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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.