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Finding the Fourth Proportional to 579.33, 869.25 and 319.32

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Solution

The fourth proportional to 579.33, 869.25 and 319.32 is: 479.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.33 : 869.25 = 319.32 : x
  2. Step 2: Convert to fraction form
    579.33/869.25 = 319.32/x
  3. Step 3: Cross multiply
    579.33x = 869.25 × 319.32
  4. Step 4: Simplify right side
    579.33x = 277,568.91
  5. Step 5: Solve for x
    x = 277,568.91/579.33
  6. Step 6: Final answer
    x = 479.12

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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.