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Finding the Fourth Proportional to 256.80, 383.73 and 223.86

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Solution

The fourth proportional to 256.80, 383.73 and 223.86 is: 334.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.80 : 383.73 = 223.86 : x
  2. Step 2: Convert to fraction form
    256.80/383.73 = 223.86/x
  3. Step 3: Cross multiply
    256.80x = 383.73 × 223.86
  4. Step 4: Simplify right side
    256.80x = 85,901.80
  5. Step 5: Solve for x
    x = 85,901.80/256.80
  6. Step 6: Final answer
    x = 334.51

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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.