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Finding the Fourth Proportional to 377.87, 521.15 and 228.47

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Solution

The fourth proportional to 377.87, 521.15 and 228.47 is: 315.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.87 : 521.15 = 228.47 : x
  2. Step 2: Convert to fraction form
    377.87/521.15 = 228.47/x
  3. Step 3: Cross multiply
    377.87x = 521.15 × 228.47
  4. Step 4: Simplify right side
    377.87x = 119,067.61
  5. Step 5: Solve for x
    x = 119,067.61/377.87
  6. Step 6: Final answer
    x = 315.11

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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.