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Finding the Fourth Proportional to 274.41, 378.87 and 256.98

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Solution

The fourth proportional to 274.41, 378.87 and 256.98 is: 354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.41 : 378.87 = 256.98 : x
  2. Step 2: Convert to fraction form
    274.41/378.87 = 256.98/x
  3. Step 3: Cross multiply
    274.41x = 378.87 × 256.98
  4. Step 4: Simplify right side
    274.41x = 97,362.01
  5. Step 5: Solve for x
    x = 97,362.01/274.41
  6. Step 6: Final answer
    x = 354.80

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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.