Home / 2,130.11-3,189.68-1,305.89

Finding the Fourth Proportional to 2,130.11, 3,189.68 and 1,305.89

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Solution

The fourth proportional to 2,130.11, 3,189.68 and 1,305.89 is: 1,955.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.11 : 3,189.68 = 1,305.89 : x
  2. Step 2: Convert to fraction form
    2,130.11/3,189.68 = 1,305.89/x
  3. Step 3: Cross multiply
    2,130.11x = 3,189.68 × 1,305.89
  4. Step 4: Simplify right side
    2,130.11x = 4,165,371.22
  5. Step 5: Solve for x
    x = 4,165,371.22/2,130.11
  6. Step 6: Final answer
    x = 1,955.47

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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.