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Finding the Fourth Proportional to 374.31, 516.54 and 208.52

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Solution

The fourth proportional to 374.31, 516.54 and 208.52 is: 287.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.31 : 516.54 = 208.52 : x
  2. Step 2: Convert to fraction form
    374.31/516.54 = 208.52/x
  3. Step 3: Cross multiply
    374.31x = 516.54 × 208.52
  4. Step 4: Simplify right side
    374.31x = 107,705.30
  5. Step 5: Solve for x
    x = 107,705.30/374.31
  6. Step 6: Final answer
    x = 287.75

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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.