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Finding the Fourth Proportional to 579.52, 869.43 and 319.48

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Solution

The fourth proportional to 579.52, 869.43 and 319.48 is: 479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.52 : 869.43 = 319.48 : x
  2. Step 2: Convert to fraction form
    579.52/869.43 = 319.48/x
  3. Step 3: Cross multiply
    579.52x = 869.43 × 319.48
  4. Step 4: Simplify right side
    579.52x = 277,764.52
  5. Step 5: Solve for x
    x = 277,764.52/579.52
  6. Step 6: Final answer
    x = 479.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.