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Finding the Fourth Proportional to 310.20, 427.96 and 179.19

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Solution

The fourth proportional to 310.20, 427.96 and 179.19 is: 247.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.20 : 427.96 = 179.19 : x
  2. Step 2: Convert to fraction form
    310.20/427.96 = 179.19/x
  3. Step 3: Cross multiply
    310.20x = 427.96 × 179.19
  4. Step 4: Simplify right side
    310.20x = 76,686.15
  5. Step 5: Solve for x
    x = 76,686.15/310.20
  6. Step 6: Final answer
    x = 247.22

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1.5x scale

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.