Home / 1,819.89-2,729.81-521.35

Finding the Fourth Proportional to 1,819.89, 2,729.81 and 521.35

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Solution

The fourth proportional to 1,819.89, 2,729.81 and 521.35 is: 782.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.89 : 2,729.81 = 521.35 : x
  2. Step 2: Convert to fraction form
    1,819.89/2,729.81 = 521.35/x
  3. Step 3: Cross multiply
    1,819.89x = 2,729.81 × 521.35
  4. Step 4: Simplify right side
    1,819.89x = 1,423,180.92
  5. Step 5: Solve for x
    x = 1,423,180.92/1,819.89
  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.