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Finding the Fourth Proportional to 246.21, 339.58 and 228.69

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Solution

The fourth proportional to 246.21, 339.58 and 228.69 is: 315.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.21 : 339.58 = 228.69 : x
  2. Step 2: Convert to fraction form
    246.21/339.58 = 228.69/x
  3. Step 3: Cross multiply
    246.21x = 339.58 × 228.69
  4. Step 4: Simplify right side
    246.21x = 77,658.55
  5. Step 5: Solve for x
    x = 77,658.55/246.21
  6. Step 6: Final answer
    x = 315.42

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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.