Home / 3,245.78-4,479.50-1,987.65

Finding the Fourth Proportional to 3,245.78, 4,479.50 and 1,987.65

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Solution

The fourth proportional to 3,245.78, 4,479.50 and 1,987.65 is: 2,743.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,245.78 : 4,479.50 = 1,987.65 : x
  2. Step 2: Convert to fraction form
    3,245.78/4,479.50 = 1,987.65/x
  3. Step 3: Cross multiply
    3,245.78x = 4,479.50 × 1,987.65
  4. Step 4: Simplify right side
    3,245.78x = 8,903,668.24
  5. Step 5: Solve for x
    x = 8,903,668.24/3,245.78
  6. Step 6: Final answer
    x = 2,743.16

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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.