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Finding the Fourth Proportional to 228.51, 315.29 and 135.23

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Solution

The fourth proportional to 228.51, 315.29 and 135.23 is: 186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.51 : 315.29 = 135.23 : x
  2. Step 2: Convert to fraction form
    228.51/315.29 = 135.23/x
  3. Step 3: Cross multiply
    228.51x = 315.29 × 135.23
  4. Step 4: Simplify right side
    228.51x = 42,635.09
  5. Step 5: Solve for x
    x = 42,635.09/228.51
  6. Step 6: Final answer
    x = 186.58

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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.