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Finding the Fourth Proportional to 500.04, 748.26 and 428.76

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Solution

The fourth proportional to 500.04, 748.26 and 428.76 is: 641.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.04 : 748.26 = 428.76 : x
  2. Step 2: Convert to fraction form
    500.04/748.26 = 428.76/x
  3. Step 3: Cross multiply
    500.04x = 748.26 × 428.76
  4. Step 4: Simplify right side
    500.04x = 320,823.96
  5. Step 5: Solve for x
    x = 320,823.96/500.04
  6. Step 6: Final answer
    x = 641.60

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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.