Home / 2,118.96-3,178.44-1,688.85

Finding the Fourth Proportional to 2,118.96, 3,178.44 and 1,688.85

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Solution

The fourth proportional to 2,118.96, 3,178.44 and 1,688.85 is: 2,533.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.96 : 3,178.44 = 1,688.85 : x
  2. Step 2: Convert to fraction form
    2,118.96/3,178.44 = 1,688.85/x
  3. Step 3: Cross multiply
    2,118.96x = 3,178.44 × 1,688.85
  4. Step 4: Simplify right side
    2,118.96x = 5,367,908.39
  5. Step 5: Solve for x
    x = 5,367,908.39/2,118.96
  6. Step 6: Final answer
    x = 2,533.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.