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Finding the Fourth Proportional to 507.43, 759.39 and 420.93

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Solution

The fourth proportional to 507.43, 759.39 and 420.93 is: 629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.43 : 759.39 = 420.93 : x
  2. Step 2: Convert to fraction form
    507.43/759.39 = 420.93/x
  3. Step 3: Cross multiply
    507.43x = 759.39 × 420.93
  4. Step 4: Simplify right side
    507.43x = 319,650.82
  5. Step 5: Solve for x
    x = 319,650.82/507.43
  6. Step 6: Final answer
    x = 629.94

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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.