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Finding the Fourth Proportional to 495.97, 684.40 and 286.15

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Solution

The fourth proportional to 495.97, 684.40 and 286.15 is: 394.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.97 : 684.40 = 286.15 : x
  2. Step 2: Convert to fraction form
    495.97/684.40 = 286.15/x
  3. Step 3: Cross multiply
    495.97x = 684.40 × 286.15
  4. Step 4: Simplify right side
    495.97x = 195,842.81
  5. Step 5: Solve for x
    x = 195,842.81/495.97
  6. Step 6: Final answer
    x = 394.87

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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.