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Finding the Fourth Proportional to 495.29, 683.46 and 285.45

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Solution

The fourth proportional to 495.29, 683.46 and 285.45 is: 393.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.29 : 683.46 = 285.45 : x
  2. Step 2: Convert to fraction form
    495.29/683.46 = 285.45/x
  3. Step 3: Cross multiply
    495.29x = 683.46 × 285.45
  4. Step 4: Simplify right side
    495.29x = 195,093.66
  5. Step 5: Solve for x
    x = 195,093.66/495.29
  6. Step 6: Final answer
    x = 393.90

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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.