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Finding the Fourth Proportional to 374.29, 516.51 and 208.47

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Solution

The fourth proportional to 374.29, 516.51 and 208.47 is: 287.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.29 : 516.51 = 208.47 : x
  2. Step 2: Convert to fraction form
    374.29/516.51 = 208.47/x
  3. Step 3: Cross multiply
    374.29x = 516.51 × 208.47
  4. Step 4: Simplify right side
    374.29x = 107,678.78
  5. Step 5: Solve for x
    x = 107,678.78/374.29
  6. Step 6: Final answer
    x = 287.69

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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.