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Finding the Fourth Proportional to 274.77, 409.82 and 257.76

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Solution

The fourth proportional to 274.77, 409.82 and 257.76 is: 384.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.77 : 409.82 = 257.76 : x
  2. Step 2: Convert to fraction form
    274.77/409.82 = 257.76/x
  3. Step 3: Cross multiply
    274.77x = 409.82 × 257.76
  4. Step 4: Simplify right side
    274.77x = 105,633.91
  5. Step 5: Solve for x
    x = 105,633.91/274.77
  6. Step 6: Final answer
    x = 384.44

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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.