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Finding the Fourth Proportional to 495.61, 683.94 and 274.57

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Solution

The fourth proportional to 495.61, 683.94 and 274.57 is: 378.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.61 : 683.94 = 274.57 : x
  2. Step 2: Convert to fraction form
    495.61/683.94 = 274.57/x
  3. Step 3: Cross multiply
    495.61x = 683.94 × 274.57
  4. Step 4: Simplify right side
    495.61x = 187,788.73
  5. Step 5: Solve for x
    x = 187,788.73/495.61
  6. Step 6: Final answer
    x = 378.91

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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.