Home / 1,421.68-1,961.36-1,049.56

Finding the Fourth Proportional to 1,421.68, 1,961.36 and 1,049.56

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Solution

The fourth proportional to 1,421.68, 1,961.36 and 1,049.56 is: 1,447.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.68 : 1,961.36 = 1,049.56 : x
  2. Step 2: Convert to fraction form
    1,421.68/1,961.36 = 1,049.56/x
  3. Step 3: Cross multiply
    1,421.68x = 1,961.36 × 1,049.56
  4. Step 4: Simplify right side
    1,421.68x = 2,058,565.00
  5. Step 5: Solve for x
    x = 2,058,565.00/1,421.68
  6. Step 6: Final answer
    x = 1,447.98

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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.