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Finding the Fourth Proportional to 517.10, 775.44 and 285.93

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Solution

The fourth proportional to 517.10, 775.44 and 285.93 is: 428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.10 : 775.44 = 285.93 : x
  2. Step 2: Convert to fraction form
    517.10/775.44 = 285.93/x
  3. Step 3: Cross multiply
    517.10x = 775.44 × 285.93
  4. Step 4: Simplify right side
    517.10x = 221,721.56
  5. Step 5: Solve for x
    x = 221,721.56/517.10
  6. Step 6: Final answer
    x = 428.78

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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.