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Finding the Fourth Proportional to 210.12, 314.70 and 112.44

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Solution

The fourth proportional to 210.12, 314.70 and 112.44 is: 168.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.12 : 314.70 = 112.44 : x
  2. Step 2: Convert to fraction form
    210.12/314.70 = 112.44/x
  3. Step 3: Cross multiply
    210.12x = 314.70 × 112.44
  4. Step 4: Simplify right side
    210.12x = 35,385.37
  5. Step 5: Solve for x
    x = 35,385.37/210.12
  6. Step 6: Final answer
    x = 168.41

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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.