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Finding the Fourth Proportional to 506.76, 759.83 and 420.62

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Solution

The fourth proportional to 506.76, 759.83 and 420.62 is: 630.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.76 : 759.83 = 420.62 : x
  2. Step 2: Convert to fraction form
    506.76/759.83 = 420.62/x
  3. Step 3: Cross multiply
    506.76x = 759.83 × 420.62
  4. Step 4: Simplify right side
    506.76x = 319,593.79
  5. Step 5: Solve for x
    x = 319,593.79/506.76
  6. Step 6: Final answer
    x = 630.66

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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.