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Finding the Fourth Proportional to 493.79, 681.47 and 284

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Solution

The fourth proportional to 493.79, 681.47 and 284 is: 391.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.79 : 681.47 = 284 : x
  2. Step 2: Convert to fraction form
    493.79/681.47 = 284/x
  3. Step 3: Cross multiply
    493.79x = 681.47 × 284
  4. Step 4: Simplify right side
    493.79x = 193,537.48
  5. Step 5: Solve for x
    x = 193,537.48/493.79
  6. Step 6: Final answer
    x = 391.94

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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.