Home / 2,189.96-3,021.78-1,403.84

Finding the Fourth Proportional to 2,189.96, 3,021.78 and 1,403.84

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Solution

The fourth proportional to 2,189.96, 3,021.78 and 1,403.84 is: 1,937.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.96 : 3,021.78 = 1,403.84 : x
  2. Step 2: Convert to fraction form
    2,189.96/3,021.78 = 1,403.84/x
  3. Step 3: Cross multiply
    2,189.96x = 3,021.78 × 1,403.84
  4. Step 4: Simplify right side
    2,189.96x = 4,242,095.64
  5. Step 5: Solve for x
    x = 4,242,095.64/2,189.96
  6. Step 6: Final answer
    x = 1,937.07

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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.