Home / 3,178.94-4,387.64-2,001.60

Finding the Fourth Proportional to 3,178.94, 4,387.64 and 2,001.60

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Solution

The fourth proportional to 3,178.94, 4,387.64 and 2,001.60 is: 2,762.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.94 : 4,387.64 = 2,001.60 : x
  2. Step 2: Convert to fraction form
    3,178.94/4,387.64 = 2,001.60/x
  3. Step 3: Cross multiply
    3,178.94x = 4,387.64 × 2,001.60
  4. Step 4: Simplify right side
    3,178.94x = 8,782,290.22
  5. Step 5: Solve for x
    x = 8,782,290.22/3,178.94
  6. Step 6: Final answer
    x = 2,762.65

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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.