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Finding the Fourth Proportional to 506.66, 759.38 and 391.53

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Solution

The fourth proportional to 506.66, 759.38 and 391.53 is: 586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.66 : 759.38 = 391.53 : x
  2. Step 2: Convert to fraction form
    506.66/759.38 = 391.53/x
  3. Step 3: Cross multiply
    506.66x = 759.38 × 391.53
  4. Step 4: Simplify right side
    506.66x = 297,320.94
  5. Step 5: Solve for x
    x = 297,320.94/506.66
  6. Step 6: Final answer
    x = 586.83

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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.