Home / 1,421.76-1,961.49-1,049.64

Finding the Fourth Proportional to 1,421.76, 1,961.49 and 1,049.64

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Solution

The fourth proportional to 1,421.76, 1,961.49 and 1,049.64 is: 1,448.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.76 : 1,961.49 = 1,049.64 : x
  2. Step 2: Convert to fraction form
    1,421.76/1,961.49 = 1,049.64/x
  3. Step 3: Cross multiply
    1,421.76x = 1,961.49 × 1,049.64
  4. Step 4: Simplify right side
    1,421.76x = 2,058,858.36
  5. Step 5: Solve for x
    x = 2,058,858.36/1,421.76
  6. Step 6: Final answer
    x = 1,448.11

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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.