Home / 1,620.02-2,429.76-579.80

Finding the Fourth Proportional to 1,620.02, 2,429.76 and 579.80

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Solution

The fourth proportional to 1,620.02, 2,429.76 and 579.80 is: 869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.02 : 2,429.76 = 579.80 : x
  2. Step 2: Convert to fraction form
    1,620.02/2,429.76 = 579.80/x
  3. Step 3: Cross multiply
    1,620.02x = 2,429.76 × 579.80
  4. Step 4: Simplify right side
    1,620.02x = 1,408,774.85
  5. Step 5: Solve for x
    x = 1,408,774.85/1,620.02
  6. Step 6: Final answer
    x = 869.60

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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.