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Finding the Fourth Proportional to 340.96, 470.24 and 256.56

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Solution

The fourth proportional to 340.96, 470.24 and 256.56 is: 353.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.96 : 470.24 = 256.56 : x
  2. Step 2: Convert to fraction form
    340.96/470.24 = 256.56/x
  3. Step 3: Cross multiply
    340.96x = 470.24 × 256.56
  4. Step 4: Simplify right side
    340.96x = 120,644.77
  5. Step 5: Solve for x
    x = 120,644.77/340.96
  6. Step 6: Final answer
    x = 353.84

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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.