Home / 1,987.93-2,742.82-1,201.83

Finding the Fourth Proportional to 1,987.93, 2,742.82 and 1,201.83

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Solution

The fourth proportional to 1,987.93, 2,742.82 and 1,201.83 is: 1,658.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.93 : 2,742.82 = 1,201.83 : x
  2. Step 2: Convert to fraction form
    1,987.93/2,742.82 = 1,201.83/x
  3. Step 3: Cross multiply
    1,987.93x = 2,742.82 × 1,201.83
  4. Step 4: Simplify right side
    1,987.93x = 3,296,403.36
  5. Step 5: Solve for x
    x = 3,296,403.36/1,987.93
  6. Step 6: Final answer
    x = 1,658.21

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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.