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Finding the Fourth Proportional to 251.04, 345.78 and 207.48

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Solution

The fourth proportional to 251.04, 345.78 and 207.48 is: 285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.04 : 345.78 = 207.48 : x
  2. Step 2: Convert to fraction form
    251.04/345.78 = 207.48/x
  3. Step 3: Cross multiply
    251.04x = 345.78 × 207.48
  4. Step 4: Simplify right side
    251.04x = 71,742.43
  5. Step 5: Solve for x
    x = 71,742.43/251.04
  6. Step 6: Final answer
    x = 285.78

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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.