Home / 2,800.16-4,201.32-1,320.20

Finding the Fourth Proportional to 2,800.16, 4,201.32 and 1,320.20

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Solution

The fourth proportional to 2,800.16, 4,201.32 and 1,320.20 is: 1,980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.16 : 4,201.32 = 1,320.20 : x
  2. Step 2: Convert to fraction form
    2,800.16/4,201.32 = 1,320.20/x
  3. Step 3: Cross multiply
    2,800.16x = 4,201.32 × 1,320.20
  4. Step 4: Simplify right side
    2,800.16x = 5,546,582.66
  5. Step 5: Solve for x
    x = 5,546,582.66/2,800.16
  6. Step 6: Final answer
    x = 1,980.81

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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.