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Finding the Fourth Proportional to 495.65, 683.95 and 274.55

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Solution

The fourth proportional to 495.65, 683.95 and 274.55 is: 378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.65 : 683.95 = 274.55 : x
  2. Step 2: Convert to fraction form
    495.65/683.95 = 274.55/x
  3. Step 3: Cross multiply
    495.65x = 683.95 × 274.55
  4. Step 4: Simplify right side
    495.65x = 187,776.93
  5. Step 5: Solve for x
    x = 187,776.93/495.65
  6. Step 6: Final answer
    x = 378.85

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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.