Home / 3,078.08-4,242.63-2,180.66

Finding the Fourth Proportional to 3,078.08, 4,242.63 and 2,180.66

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Solution

The fourth proportional to 3,078.08, 4,242.63 and 2,180.66 is: 3,005.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.08 : 4,242.63 = 2,180.66 : x
  2. Step 2: Convert to fraction form
    3,078.08/4,242.63 = 2,180.66/x
  3. Step 3: Cross multiply
    3,078.08x = 4,242.63 × 2,180.66
  4. Step 4: Simplify right side
    3,078.08x = 9,251,712.32
  5. Step 5: Solve for x
    x = 9,251,712.32/3,078.08
  6. Step 6: Final answer
    x = 3,005.68

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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.