Home / 1,272.19-1,908.29-450.55

Finding the Fourth Proportional to 1,272.19, 1,908.29 and 450.55

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Solution

The fourth proportional to 1,272.19, 1,908.29 and 450.55 is: 675.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.19 : 1,908.29 = 450.55 : x
  2. Step 2: Convert to fraction form
    1,272.19/1,908.29 = 450.55/x
  3. Step 3: Cross multiply
    1,272.19x = 1,908.29 × 450.55
  4. Step 4: Simplify right side
    1,272.19x = 859,780.06
  5. Step 5: Solve for x
    x = 859,780.06/1,272.19
  6. Step 6: Final answer
    x = 675.83

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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.