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Finding the Fourth Proportional to 228.63, 315.48 and 145.61

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Solution

The fourth proportional to 228.63, 315.48 and 145.61 is: 200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.63 : 315.48 = 145.61 : x
  2. Step 2: Convert to fraction form
    228.63/315.48 = 145.61/x
  3. Step 3: Cross multiply
    228.63x = 315.48 × 145.61
  4. Step 4: Simplify right side
    228.63x = 45,934.74
  5. Step 5: Solve for x
    x = 45,934.74/228.63
  6. Step 6: Final answer
    x = 200.91

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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.