Home / 3,412.32-5,119.56-1,221

Finding the Fourth Proportional to 3,412.32, 5,119.56 and 1,221

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Solution

The fourth proportional to 3,412.32, 5,119.56 and 1,221 is: 1,831.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.32 : 5,119.56 = 1,221 : x
  2. Step 2: Convert to fraction form
    3,412.32/5,119.56 = 1,221/x
  3. Step 3: Cross multiply
    3,412.32x = 5,119.56 × 1,221
  4. Step 4: Simplify right side
    3,412.32x = 6,250,982.76
  5. Step 5: Solve for x
    x = 6,250,982.76/3,412.32
  6. Step 6: Final answer
    x = 1,831.89

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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.