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Finding the Fourth Proportional to 507.31, 757.87 and 404.80

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Solution

The fourth proportional to 507.31, 757.87 and 404.80 is: 604.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.31 : 757.87 = 404.80 : x
  2. Step 2: Convert to fraction form
    507.31/757.87 = 404.80/x
  3. Step 3: Cross multiply
    507.31x = 757.87 × 404.80
  4. Step 4: Simplify right side
    507.31x = 306,782.87
  5. Step 5: Solve for x
    x = 306,782.87/507.31
  6. Step 6: Final answer
    x = 604.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.