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Finding the Fourth Proportional to 228.53, 315.47 and 145.74

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Solution

The fourth proportional to 228.53, 315.47 and 145.74 is: 201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.53 : 315.47 = 145.74 : x
  2. Step 2: Convert to fraction form
    228.53/315.47 = 145.74/x
  3. Step 3: Cross multiply
    228.53x = 315.47 × 145.74
  4. Step 4: Simplify right side
    228.53x = 45,978.15
  5. Step 5: Solve for x
    x = 45,978.15/228.53
  6. Step 6: Final answer
    x = 201.19

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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.