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Finding the Fourth Proportional to 300.72, 414.60 and 207.30

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Solution

The fourth proportional to 300.72, 414.60 and 207.30 is: 285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.72 : 414.60 = 207.30 : x
  2. Step 2: Convert to fraction form
    300.72/414.60 = 207.30/x
  3. Step 3: Cross multiply
    300.72x = 414.60 × 207.30
  4. Step 4: Simplify right side
    300.72x = 85,946.58
  5. Step 5: Solve for x
    x = 85,946.58/300.72
  6. Step 6: Final answer
    x = 285.80

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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.