Home / 3,239.22-4,860.45-1,390.80

Finding the Fourth Proportional to 3,239.22, 4,860.45 and 1,390.80

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Solution

The fourth proportional to 3,239.22, 4,860.45 and 1,390.80 is: 2,086.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.22 : 4,860.45 = 1,390.80 : x
  2. Step 2: Convert to fraction form
    3,239.22/4,860.45 = 1,390.80/x
  3. Step 3: Cross multiply
    3,239.22x = 4,860.45 × 1,390.80
  4. Step 4: Simplify right side
    3,239.22x = 6,759,913.86
  5. Step 5: Solve for x
    x = 6,759,913.86/3,239.22
  6. Step 6: Final answer
    x = 2,086.90

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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.