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Finding the Fourth Proportional to 486.54, 670.91 and 423.83

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Solution

The fourth proportional to 486.54, 670.91 and 423.83 is: 584.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.54 : 670.91 = 423.83 : x
  2. Step 2: Convert to fraction form
    486.54/670.91 = 423.83/x
  3. Step 3: Cross multiply
    486.54x = 670.91 × 423.83
  4. Step 4: Simplify right side
    486.54x = 284,351.79
  5. Step 5: Solve for x
    x = 284,351.79/486.54
  6. Step 6: Final answer
    x = 584.44

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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.