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Finding the Fourth Proportional to 495.28, 683.42 and 285.48

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Solution

The fourth proportional to 495.28, 683.42 and 285.48 is: 393.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.28 : 683.42 = 285.48 : x
  2. Step 2: Convert to fraction form
    495.28/683.42 = 285.48/x
  3. Step 3: Cross multiply
    495.28x = 683.42 × 285.48
  4. Step 4: Simplify right side
    495.28x = 195,102.74
  5. Step 5: Solve for x
    x = 195,102.74/495.28
  6. Step 6: Final answer
    x = 393.92

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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.