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Finding the Fourth Proportional to 594.40, 819.30 and 428.38

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Solution

The fourth proportional to 594.40, 819.30 and 428.38 is: 590.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.40 : 819.30 = 428.38 : x
  2. Step 2: Convert to fraction form
    594.40/819.30 = 428.38/x
  3. Step 3: Cross multiply
    594.40x = 819.30 × 428.38
  4. Step 4: Simplify right side
    594.40x = 350,971.73
  5. Step 5: Solve for x
    x = 350,971.73/594.40
  6. Step 6: Final answer
    x = 590.46

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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.