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Finding the Fourth Proportional to 510.71, 704.83 and 289.73

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Solution

The fourth proportional to 510.71, 704.83 and 289.73 is: 399.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.71 : 704.83 = 289.73 : x
  2. Step 2: Convert to fraction form
    510.71/704.83 = 289.73/x
  3. Step 3: Cross multiply
    510.71x = 704.83 × 289.73
  4. Step 4: Simplify right side
    510.71x = 204,211.43
  5. Step 5: Solve for x
    x = 204,211.43/510.71
  6. Step 6: Final answer
    x = 399.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.