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Finding the Fourth Proportional to 228.57, 315.51 and 145.68

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Solution

The fourth proportional to 228.57, 315.51 and 145.68 is: 201.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.57 : 315.51 = 145.68 : x
  2. Step 2: Convert to fraction form
    228.57/315.51 = 145.68/x
  3. Step 3: Cross multiply
    228.57x = 315.51 × 145.68
  4. Step 4: Simplify right side
    228.57x = 45,963.50
  5. Step 5: Solve for x
    x = 45,963.50/228.57
  6. Step 6: Final answer
    x = 201.09

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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.