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Finding the Fourth Proportional to 495.75, 684.14 and 285.93

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Solution

The fourth proportional to 495.75, 684.14 and 285.93 is: 394.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.75 : 684.14 = 285.93 : x
  2. Step 2: Convert to fraction form
    495.75/684.14 = 285.93/x
  3. Step 3: Cross multiply
    495.75x = 684.14 × 285.93
  4. Step 4: Simplify right side
    495.75x = 195,616.87
  5. Step 5: Solve for x
    x = 195,616.87/495.75
  6. Step 6: Final answer
    x = 394.58

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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.