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Finding the Fourth Proportional to 374.79, 517.17 and 208.99

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Solution

The fourth proportional to 374.79, 517.17 and 208.99 is: 288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.79 : 517.17 = 208.99 : x
  2. Step 2: Convert to fraction form
    374.79/517.17 = 208.99/x
  3. Step 3: Cross multiply
    374.79x = 517.17 × 208.99
  4. Step 4: Simplify right side
    374.79x = 108,083.36
  5. Step 5: Solve for x
    x = 108,083.36/374.79
  6. Step 6: Final answer
    x = 288.38

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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.