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Finding the Fourth Proportional to 376.16, 518.90 and 228.69

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Solution

The fourth proportional to 376.16, 518.90 and 228.69 is: 315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.16 : 518.90 = 228.69 : x
  2. Step 2: Convert to fraction form
    376.16/518.90 = 228.69/x
  3. Step 3: Cross multiply
    376.16x = 518.90 × 228.69
  4. Step 4: Simplify right side
    376.16x = 118,666.10
  5. Step 5: Solve for x
    x = 118,666.10/376.16
  6. Step 6: Final answer
    x = 315.47

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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.