Home / 2,163.60-2,987.44-1,690.68

Finding the Fourth Proportional to 2,163.60, 2,987.44 and 1,690.68

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Solution

The fourth proportional to 2,163.60, 2,987.44 and 1,690.68 is: 2,334.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.60 : 2,987.44 = 1,690.68 : x
  2. Step 2: Convert to fraction form
    2,163.60/2,987.44 = 1,690.68/x
  3. Step 3: Cross multiply
    2,163.60x = 2,987.44 × 1,690.68
  4. Step 4: Simplify right side
    2,163.60x = 5,050,781.67
  5. Step 5: Solve for x
    x = 5,050,781.67/2,163.60
  6. Step 6: Final answer
    x = 2,334.44

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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.