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Finding the Fourth Proportional to 372.40, 514 and 256

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Solution

The fourth proportional to 372.40, 514 and 256 is: 353.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.40 : 514 = 256 : x
  2. Step 2: Convert to fraction form
    372.40/514 = 256/x
  3. Step 3: Cross multiply
    372.40x = 514 × 256
  4. Step 4: Simplify right side
    372.40x = 131,584
  5. Step 5: Solve for x
    x = 131,584/372.40
  6. Step 6: Final answer
    x = 353.34

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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.