Home / 2,118.08-2,921.64-1,409.88

Finding the Fourth Proportional to 2,118.08, 2,921.64 and 1,409.88

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Solution

The fourth proportional to 2,118.08, 2,921.64 and 1,409.88 is: 1,944.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.08 : 2,921.64 = 1,409.88 : x
  2. Step 2: Convert to fraction form
    2,118.08/2,921.64 = 1,409.88/x
  3. Step 3: Cross multiply
    2,118.08x = 2,921.64 × 1,409.88
  4. Step 4: Simplify right side
    2,118.08x = 4,119,161.80
  5. Step 5: Solve for x
    x = 4,119,161.80/2,118.08
  6. Step 6: Final answer
    x = 1,944.76

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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.