Home / 2,987.03-4,121.87-1,660.65

Finding the Fourth Proportional to 2,987.03, 4,121.87 and 1,660.65

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Solution

The fourth proportional to 2,987.03, 4,121.87 and 1,660.65 is: 2,291.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.03 : 4,121.87 = 1,660.65 : x
  2. Step 2: Convert to fraction form
    2,987.03/4,121.87 = 1,660.65/x
  3. Step 3: Cross multiply
    2,987.03x = 4,121.87 × 1,660.65
  4. Step 4: Simplify right side
    2,987.03x = 6,844,975.11
  5. Step 5: Solve for x
    x = 6,844,975.11/2,987.03
  6. Step 6: Final answer
    x = 2,291.57

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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.