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Finding the Fourth Proportional to 495.57, 683.83 and 274.50

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Solution

The fourth proportional to 495.57, 683.83 and 274.50 is: 378.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.57 : 683.83 = 274.50 : x
  2. Step 2: Convert to fraction form
    495.57/683.83 = 274.50/x
  3. Step 3: Cross multiply
    495.57x = 683.83 × 274.50
  4. Step 4: Simplify right side
    495.57x = 187,711.34
  5. Step 5: Solve for x
    x = 187,711.34/495.57
  6. Step 6: Final answer
    x = 378.78

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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.