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Finding the Fourth Proportional to 488.99, 674.54 and 422.86

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Solution

The fourth proportional to 488.99, 674.54 and 422.86 is: 583.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.99 : 674.54 = 422.86 : x
  2. Step 2: Convert to fraction form
    488.99/674.54 = 422.86/x
  3. Step 3: Cross multiply
    488.99x = 674.54 × 422.86
  4. Step 4: Simplify right side
    488.99x = 285,233.87
  5. Step 5: Solve for x
    x = 285,233.87/488.99
  6. Step 6: Final answer
    x = 583.31

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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.