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Finding the Fourth Proportional to 210.22, 315.25 and 88.42

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Solution

The fourth proportional to 210.22, 315.25 and 88.42 is: 132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.22 : 315.25 = 88.42 : x
  2. Step 2: Convert to fraction form
    210.22/315.25 = 88.42/x
  3. Step 3: Cross multiply
    210.22x = 315.25 × 88.42
  4. Step 4: Simplify right side
    210.22x = 27,874.41
  5. Step 5: Solve for x
    x = 27,874.41/210.22
  6. Step 6: Final answer
    x = 132.60

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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.