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Finding the Fourth Proportional to 589.56, 882.90 and 428.28

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Solution

The fourth proportional to 589.56, 882.90 and 428.28 is: 641.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.56 : 882.90 = 428.28 : x
  2. Step 2: Convert to fraction form
    589.56/882.90 = 428.28/x
  3. Step 3: Cross multiply
    589.56x = 882.90 × 428.28
  4. Step 4: Simplify right side
    589.56x = 378,128.41
  5. Step 5: Solve for x
    x = 378,128.41/589.56
  6. Step 6: Final answer
    x = 641.37

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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.