Home / 2,782.80-4,181.58-1,687.32

Finding the Fourth Proportional to 2,782.80, 4,181.58 and 1,687.32

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Solution

The fourth proportional to 2,782.80, 4,181.58 and 1,687.32 is: 2,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.80 : 4,181.58 = 1,687.32 : x
  2. Step 2: Convert to fraction form
    2,782.80/4,181.58 = 1,687.32/x
  3. Step 3: Cross multiply
    2,782.80x = 4,181.58 × 1,687.32
  4. Step 4: Simplify right side
    2,782.80x = 7,055,663.57
  5. Step 5: Solve for x
    x = 7,055,663.57/2,782.80
  6. Step 6: Final answer
    x = 2,535.45

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1.5x scale

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.