Home / 2,805.96-3,872.57-1,687.48

Finding the Fourth Proportional to 2,805.96, 3,872.57 and 1,687.48

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Solution

The fourth proportional to 2,805.96, 3,872.57 and 1,687.48 is: 2,328.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.96 : 3,872.57 = 1,687.48 : x
  2. Step 2: Convert to fraction form
    2,805.96/3,872.57 = 1,687.48/x
  3. Step 3: Cross multiply
    2,805.96x = 3,872.57 × 1,687.48
  4. Step 4: Simplify right side
    2,805.96x = 6,534,875.99
  5. Step 5: Solve for x
    x = 6,534,875.99/2,805.96
  6. Step 6: Final answer
    x = 2,328.93

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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.