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Finding the Fourth Proportional to 210.88, 315.91 and 174.43

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Solution

The fourth proportional to 210.88, 315.91 and 174.43 is: 261.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.88 : 315.91 = 174.43 : x
  2. Step 2: Convert to fraction form
    210.88/315.91 = 174.43/x
  3. Step 3: Cross multiply
    210.88x = 315.91 × 174.43
  4. Step 4: Simplify right side
    210.88x = 55,104.18
  5. Step 5: Solve for x
    x = 55,104.18/210.88
  6. Step 6: Final answer
    x = 261.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.