Home / 2,681.56-4,021.20-1,221.64

Finding the Fourth Proportional to 2,681.56, 4,021.20 and 1,221.64

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Solution

The fourth proportional to 2,681.56, 4,021.20 and 1,221.64 is: 1,831.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.56 : 4,021.20 = 1,221.64 : x
  2. Step 2: Convert to fraction form
    2,681.56/4,021.20 = 1,221.64/x
  3. Step 3: Cross multiply
    2,681.56x = 4,021.20 × 1,221.64
  4. Step 4: Simplify right side
    2,681.56x = 4,912,458.77
  5. Step 5: Solve for x
    x = 4,912,458.77/2,681.56
  6. Step 6: Final answer
    x = 1,831.94

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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.