Home / 1,285.88-1,919.30-1,254.80

Finding the Fourth Proportional to 1,285.88, 1,919.30 and 1,254.80

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Solution

The fourth proportional to 1,285.88, 1,919.30 and 1,254.80 is: 1,872.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.88 : 1,919.30 = 1,254.80 : x
  2. Step 2: Convert to fraction form
    1,285.88/1,919.30 = 1,254.80/x
  3. Step 3: Cross multiply
    1,285.88x = 1,919.30 × 1,254.80
  4. Step 4: Simplify right side
    1,285.88x = 2,408,336.16
  5. Step 5: Solve for x
    x = 2,408,336.16/1,285.88
  6. Step 6: Final answer
    x = 1,872.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.