Home / 3,178.35-4,386.12-1,936.35

Finding the Fourth Proportional to 3,178.35, 4,386.12 and 1,936.35

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Solution

The fourth proportional to 3,178.35, 4,386.12 and 1,936.35 is: 2,672.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.35 : 4,386.12 = 1,936.35 : x
  2. Step 2: Convert to fraction form
    3,178.35/4,386.12 = 1,936.35/x
  3. Step 3: Cross multiply
    3,178.35x = 4,386.12 × 1,936.35
  4. Step 4: Simplify right side
    3,178.35x = 8,493,031.85
  5. Step 5: Solve for x
    x = 8,493,031.85/3,178.35
  6. Step 6: Final answer
    x = 2,672.16

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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.