Home / 1,819.62-2,729.63-521.30

Finding the Fourth Proportional to 1,819.62, 2,729.63 and 521.30

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Solution

The fourth proportional to 1,819.62, 2,729.63 and 521.30 is: 782.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.62 : 2,729.63 = 521.30 : x
  2. Step 2: Convert to fraction form
    1,819.62/2,729.63 = 521.30/x
  3. Step 3: Cross multiply
    1,819.62x = 2,729.63 × 521.30
  4. Step 4: Simplify right side
    1,819.62x = 1,422,956.12
  5. Step 5: Solve for x
    x = 1,422,956.12/1,819.62
  6. Step 6: Final answer
    x = 782.01

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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.