Home / 1,819.30-2,729.08-520.86

Finding the Fourth Proportional to 1,819.30, 2,729.08 and 520.86

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Solution

The fourth proportional to 1,819.30, 2,729.08 and 520.86 is: 781.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.30 : 2,729.08 = 520.86 : x
  2. Step 2: Convert to fraction form
    1,819.30/2,729.08 = 520.86/x
  3. Step 3: Cross multiply
    1,819.30x = 2,729.08 × 520.86
  4. Step 4: Simplify right side
    1,819.30x = 1,421,468.61
  5. Step 5: Solve for x
    x = 1,421,468.61/1,819.30
  6. Step 6: Final answer
    x = 781.33

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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.