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Finding the Fourth Proportional to 509.87, 764.82 and 371.47

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Solution

The fourth proportional to 509.87, 764.82 and 371.47 is: 557.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.87 : 764.82 = 371.47 : x
  2. Step 2: Convert to fraction form
    509.87/764.82 = 371.47/x
  3. Step 3: Cross multiply
    509.87x = 764.82 × 371.47
  4. Step 4: Simplify right side
    509.87x = 284,108.67
  5. Step 5: Solve for x
    x = 284,108.67/509.87
  6. Step 6: Final answer
    x = 557.22

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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.