Home / 3,221.48-4,831.20-1,987.04

Finding the Fourth Proportional to 3,221.48, 4,831.20 and 1,987.04

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Solution

The fourth proportional to 3,221.48, 4,831.20 and 1,987.04 is: 2,979.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.48 : 4,831.20 = 1,987.04 : x
  2. Step 2: Convert to fraction form
    3,221.48/4,831.20 = 1,987.04/x
  3. Step 3: Cross multiply
    3,221.48x = 4,831.20 × 1,987.04
  4. Step 4: Simplify right side
    3,221.48x = 9,599,763.49
  5. Step 5: Solve for x
    x = 9,599,763.49/3,221.48
  6. Step 6: Final answer
    x = 2,979.93

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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.