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Finding the Fourth Proportional to 228.72, 340.63 and 214.75

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Solution

The fourth proportional to 228.72, 340.63 and 214.75 is: 319.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.72 : 340.63 = 214.75 : x
  2. Step 2: Convert to fraction form
    228.72/340.63 = 214.75/x
  3. Step 3: Cross multiply
    228.72x = 340.63 × 214.75
  4. Step 4: Simplify right side
    228.72x = 73,150.29
  5. Step 5: Solve for x
    x = 73,150.29/228.72
  6. Step 6: Final answer
    x = 319.82

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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.