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Finding the Fourth Proportional to 374.86, 517.30 and 209.07

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Solution

The fourth proportional to 374.86, 517.30 and 209.07 is: 288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.86 : 517.30 = 209.07 : x
  2. Step 2: Convert to fraction form
    374.86/517.30 = 209.07/x
  3. Step 3: Cross multiply
    374.86x = 517.30 × 209.07
  4. Step 4: Simplify right side
    374.86x = 108,148.66
  5. Step 5: Solve for x
    x = 108,148.66/374.86
  6. Step 6: Final answer
    x = 288.51

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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.