Home / 1,878.42-2,817.90-579.57

Finding the Fourth Proportional to 1,878.42, 2,817.90 and 579.57

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Solution

The fourth proportional to 1,878.42, 2,817.90 and 579.57 is: 869.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.42 : 2,817.90 = 579.57 : x
  2. Step 2: Convert to fraction form
    1,878.42/2,817.90 = 579.57/x
  3. Step 3: Cross multiply
    1,878.42x = 2,817.90 × 579.57
  4. Step 4: Simplify right side
    1,878.42x = 1,633,170.30
  5. Step 5: Solve for x
    x = 1,633,170.30/1,878.42
  6. Step 6: Final answer
    x = 869.44

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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.