Home / 2,305.20-3,180.24-1,420.08

Finding the Fourth Proportional to 2,305.20, 3,180.24 and 1,420.08

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Solution

The fourth proportional to 2,305.20, 3,180.24 and 1,420.08 is: 1,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.20 : 3,180.24 = 1,420.08 : x
  2. Step 2: Convert to fraction form
    2,305.20/3,180.24 = 1,420.08/x
  3. Step 3: Cross multiply
    2,305.20x = 3,180.24 × 1,420.08
  4. Step 4: Simplify right side
    2,305.20x = 4,516,195.22
  5. Step 5: Solve for x
    x = 4,516,195.22/2,305.20
  6. Step 6: Final answer
    x = 1,959.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.