Home / 1,985.25-2,739.65-1,286.63

Finding the Fourth Proportional to 1,985.25, 2,739.65 and 1,286.63

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Solution

The fourth proportional to 1,985.25, 2,739.65 and 1,286.63 is: 1,775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.25 : 2,739.65 = 1,286.63 : x
  2. Step 2: Convert to fraction form
    1,985.25/2,739.65 = 1,286.63/x
  3. Step 3: Cross multiply
    1,985.25x = 2,739.65 × 1,286.63
  4. Step 4: Simplify right side
    1,985.25x = 3,524,895.75
  5. Step 5: Solve for x
    x = 3,524,895.75/1,985.25
  6. Step 6: Final answer
    x = 1,775.54

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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.