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Finding the Fourth Proportional to 1,819.73, 2,729.73 and 521.30

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Solution

The fourth proportional to 1,819.73, 2,729.73 and 521.30 is: 781.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.73 : 2,729.73 = 521.30 : x
  2. Step 2: Convert to fraction form
    1,819.73/2,729.73 = 521.30/x
  3. Step 3: Cross multiply
    1,819.73x = 2,729.73 × 521.30
  4. Step 4: Simplify right side
    1,819.73x = 1,423,008.25
  5. Step 5: Solve for x
    x = 1,423,008.25/1,819.73
  6. Step 6: Final answer
    x = 781.99

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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.