Home / 2,520.08-3,780.24-1,221.20

Finding the Fourth Proportional to 2,520.08, 3,780.24 and 1,221.20

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Solution

The fourth proportional to 2,520.08, 3,780.24 and 1,221.20 is: 1,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.08 : 3,780.24 = 1,221.20 : x
  2. Step 2: Convert to fraction form
    2,520.08/3,780.24 = 1,221.20/x
  3. Step 3: Cross multiply
    2,520.08x = 3,780.24 × 1,221.20
  4. Step 4: Simplify right side
    2,520.08x = 4,616,429.09
  5. Step 5: Solve for x
    x = 4,616,429.09/2,520.08
  6. Step 6: Final answer
    x = 1,831.86

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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.