Home / 1,620.24-2,429.76-579.96

Finding the Fourth Proportional to 1,620.24, 2,429.76 and 579.96

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Solution

The fourth proportional to 1,620.24, 2,429.76 and 579.96 is: 869.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.24 : 2,429.76 = 579.96 : x
  2. Step 2: Convert to fraction form
    1,620.24/2,429.76 = 579.96/x
  3. Step 3: Cross multiply
    1,620.24x = 2,429.76 × 579.96
  4. Step 4: Simplify right side
    1,620.24x = 1,409,163.61
  5. Step 5: Solve for x
    x = 1,409,163.61/1,620.24
  6. Step 6: Final answer
    x = 869.73

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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.