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Finding the Fourth Proportional to 325.30, 487.14 and 228.64

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Solution

The fourth proportional to 325.30, 487.14 and 228.64 is: 342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.30 : 487.14 = 228.64 : x
  2. Step 2: Convert to fraction form
    325.30/487.14 = 228.64/x
  3. Step 3: Cross multiply
    325.30x = 487.14 × 228.64
  4. Step 4: Simplify right side
    325.30x = 111,379.69
  5. Step 5: Solve for x
    x = 111,379.69/325.30
  6. Step 6: Final answer
    x = 342.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.