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Finding the Fourth Proportional to 224.90, 310.40 and 131.70

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Solution

The fourth proportional to 224.90, 310.40 and 131.70 is: 181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.90 : 310.40 = 131.70 : x
  2. Step 2: Convert to fraction form
    224.90/310.40 = 131.70/x
  3. Step 3: Cross multiply
    224.90x = 310.40 × 131.70
  4. Step 4: Simplify right side
    224.90x = 40,879.68
  5. Step 5: Solve for x
    x = 40,879.68/224.90
  6. Step 6: Final answer
    x = 181.77

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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.