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Finding the Fourth Proportional to 495.28, 683.47 and 274.20

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Solution

The fourth proportional to 495.28, 683.47 and 274.20 is: 378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.28 : 683.47 = 274.20 : x
  2. Step 2: Convert to fraction form
    495.28/683.47 = 274.20/x
  3. Step 3: Cross multiply
    495.28x = 683.47 × 274.20
  4. Step 4: Simplify right side
    495.28x = 187,407.47
  5. Step 5: Solve for x
    x = 187,407.47/495.28
  6. Step 6: Final answer
    x = 378.39

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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.