Home / 1,272.35-1,908.45-450.60

Finding the Fourth Proportional to 1,272.35, 1,908.45 and 450.60

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Solution

The fourth proportional to 1,272.35, 1,908.45 and 450.60 is: 675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.35 : 1,908.45 = 450.60 : x
  2. Step 2: Convert to fraction form
    1,272.35/1,908.45 = 450.60/x
  3. Step 3: Cross multiply
    1,272.35x = 1,908.45 × 450.60
  4. Step 4: Simplify right side
    1,272.35x = 859,947.57
  5. Step 5: Solve for x
    x = 859,947.57/1,272.35
  6. Step 6: Final answer
    x = 675.88

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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.