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Finding the Fourth Proportional to 495.64, 683.95 and 274.58

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Solution

The fourth proportional to 495.64, 683.95 and 274.58 is: 378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.64 : 683.95 = 274.58 : x
  2. Step 2: Convert to fraction form
    495.64/683.95 = 274.58/x
  3. Step 3: Cross multiply
    495.64x = 683.95 × 274.58
  4. Step 4: Simplify right side
    495.64x = 187,795.57
  5. Step 5: Solve for x
    x = 187,795.57/495.64
  6. Step 6: Final answer
    x = 378.90

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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.