Home / 2,987.68-4,479.60-1,960.48

Finding the Fourth Proportional to 2,987.68, 4,479.60 and 1,960.48

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Solution

The fourth proportional to 2,987.68, 4,479.60 and 1,960.48 is: 2,939.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.68 : 4,479.60 = 1,960.48 : x
  2. Step 2: Convert to fraction form
    2,987.68/4,479.60 = 1,960.48/x
  3. Step 3: Cross multiply
    2,987.68x = 4,479.60 × 1,960.48
  4. Step 4: Simplify right side
    2,987.68x = 8,782,166.21
  5. Step 5: Solve for x
    x = 8,782,166.21/2,987.68
  6. Step 6: Final answer
    x = 2,939.46

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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.