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Finding the Fourth Proportional to 225.45, 310.95 and 145.71

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Solution

The fourth proportional to 225.45, 310.95 and 145.71 is: 200.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.45 : 310.95 = 145.71 : x
  2. Step 2: Convert to fraction form
    225.45/310.95 = 145.71/x
  3. Step 3: Cross multiply
    225.45x = 310.95 × 145.71
  4. Step 4: Simplify right side
    225.45x = 45,308.52
  5. Step 5: Solve for x
    x = 45,308.52/225.45
  6. Step 6: Final answer
    x = 200.97

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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.