Home / 2,857.90-4,289.55-1,764.40

Finding the Fourth Proportional to 2,857.90, 4,289.55 and 1,764.40

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Solution

The fourth proportional to 2,857.90, 4,289.55 and 1,764.40 is: 2,648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.90 : 4,289.55 = 1,764.40 : x
  2. Step 2: Convert to fraction form
    2,857.90/4,289.55 = 1,764.40/x
  3. Step 3: Cross multiply
    2,857.90x = 4,289.55 × 1,764.40
  4. Step 4: Simplify right side
    2,857.90x = 7,568,482.02
  5. Step 5: Solve for x
    x = 7,568,482.02/2,857.90
  6. Step 6: Final answer
    x = 2,648.27

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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.