Home / 1,620.20-2,429.10-1,098.90

Finding the Fourth Proportional to 1,620.20, 2,429.10 and 1,098.90

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Solution

The fourth proportional to 1,620.20, 2,429.10 and 1,098.90 is: 1,647.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.20 : 2,429.10 = 1,098.90 : x
  2. Step 2: Convert to fraction form
    1,620.20/2,429.10 = 1,098.90/x
  3. Step 3: Cross multiply
    1,620.20x = 2,429.10 × 1,098.90
  4. Step 4: Simplify right side
    1,620.20x = 2,669,337.99
  5. Step 5: Solve for x
    x = 2,669,337.99/1,620.20
  6. Step 6: Final answer
    x = 1,647.54

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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.