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Finding the Fourth Proportional to 594.85, 819.78 and 428.78

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Solution

The fourth proportional to 594.85, 819.78 and 428.78 is: 590.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.85 : 819.78 = 428.78 : x
  2. Step 2: Convert to fraction form
    594.85/819.78 = 428.78/x
  3. Step 3: Cross multiply
    594.85x = 819.78 × 428.78
  4. Step 4: Simplify right side
    594.85x = 351,505.27
  5. Step 5: Solve for x
    x = 351,505.27/594.85
  6. Step 6: Final answer
    x = 590.91

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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.