Home / 2,187.81-3,021.20-1,403.22

Finding the Fourth Proportional to 2,187.81, 3,021.20 and 1,403.22

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Solution

The fourth proportional to 2,187.81, 3,021.20 and 1,403.22 is: 1,937.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.81 : 3,021.20 = 1,403.22 : x
  2. Step 2: Convert to fraction form
    2,187.81/3,021.20 = 1,403.22/x
  3. Step 3: Cross multiply
    2,187.81x = 3,021.20 × 1,403.22
  4. Step 4: Simplify right side
    2,187.81x = 4,239,417.84
  5. Step 5: Solve for x
    x = 4,239,417.84/2,187.81
  6. Step 6: Final answer
    x = 1,937.74

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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.