Home / 2,178.08-3,004.40-1,339.20

Finding the Fourth Proportional to 2,178.08, 3,004.40 and 1,339.20

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Solution

The fourth proportional to 2,178.08, 3,004.40 and 1,339.20 is: 1,847.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.08 : 3,004.40 = 1,339.20 : x
  2. Step 2: Convert to fraction form
    2,178.08/3,004.40 = 1,339.20/x
  3. Step 3: Cross multiply
    2,178.08x = 3,004.40 × 1,339.20
  4. Step 4: Simplify right side
    2,178.08x = 4,023,492.48
  5. Step 5: Solve for x
    x = 4,023,492.48/2,178.08
  6. Step 6: Final answer
    x = 1,847.27

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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.