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Finding the Fourth Proportional to 1,602.19, 2,399.91 and 819.81

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Solution

The fourth proportional to 1,602.19, 2,399.91 and 819.81 is: 1,227.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,602.19 : 2,399.91 = 819.81 : x
  2. Step 2: Convert to fraction form
    1,602.19/2,399.91 = 819.81/x
  3. Step 3: Cross multiply
    1,602.19x = 2,399.91 × 819.81
  4. Step 4: Simplify right side
    1,602.19x = 1,967,467.14
  5. Step 5: Solve for x
    x = 1,967,467.14/1,602.19
  6. Step 6: Final answer
    x = 1,227.99

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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.