Home / 2,847.75-3,929.90-1,605.75

Finding the Fourth Proportional to 2,847.75, 3,929.90 and 1,605.75

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Solution

The fourth proportional to 2,847.75, 3,929.90 and 1,605.75 is: 2,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.75 : 3,929.90 = 1,605.75 : x
  2. Step 2: Convert to fraction form
    2,847.75/3,929.90 = 1,605.75/x
  3. Step 3: Cross multiply
    2,847.75x = 3,929.90 × 1,605.75
  4. Step 4: Simplify right side
    2,847.75x = 6,310,428.90
  5. Step 5: Solve for x
    x = 6,310,428.90/2,847.75
  6. Step 6: Final answer
    x = 2,215.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.