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Finding the Fourth Proportional to 228.33, 340.56 and 215.72

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Solution

The fourth proportional to 228.33, 340.56 and 215.72 is: 321.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.33 : 340.56 = 215.72 : x
  2. Step 2: Convert to fraction form
    228.33/340.56 = 215.72/x
  3. Step 3: Cross multiply
    228.33x = 340.56 × 215.72
  4. Step 4: Simplify right side
    228.33x = 73,463.90
  5. Step 5: Solve for x
    x = 73,463.90/228.33
  6. Step 6: Final answer
    x = 321.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.