Home / 3,081.69-4,618.40-1,985.49

Finding the Fourth Proportional to 3,081.69, 4,618.40 and 1,985.49

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Solution

The fourth proportional to 3,081.69, 4,618.40 and 1,985.49 is: 2,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.69 : 4,618.40 = 1,985.49 : x
  2. Step 2: Convert to fraction form
    3,081.69/4,618.40 = 1,985.49/x
  3. Step 3: Cross multiply
    3,081.69x = 4,618.40 × 1,985.49
  4. Step 4: Simplify right side
    3,081.69x = 9,169,777.09
  5. Step 5: Solve for x
    x = 9,169,777.09/3,081.69
  6. Step 6: Final answer
    x = 2,975.57

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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.