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Finding the Fourth Proportional to 256.12, 382.20 and 228.84

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Solution

The fourth proportional to 256.12, 382.20 and 228.84 is: 341.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.12 : 382.20 = 228.84 : x
  2. Step 2: Convert to fraction form
    256.12/382.20 = 228.84/x
  3. Step 3: Cross multiply
    256.12x = 382.20 × 228.84
  4. Step 4: Simplify right side
    256.12x = 87,462.65
  5. Step 5: Solve for x
    x = 87,462.65/256.12
  6. Step 6: Final answer
    x = 341.49

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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.