Home / 1,919.99-2,648.35-1,257.64

Finding the Fourth Proportional to 1,919.99, 2,648.35 and 1,257.64

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Solution

The fourth proportional to 1,919.99, 2,648.35 and 1,257.64 is: 1,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.99 : 2,648.35 = 1,257.64 : x
  2. Step 2: Convert to fraction form
    1,919.99/2,648.35 = 1,257.64/x
  3. Step 3: Cross multiply
    1,919.99x = 2,648.35 × 1,257.64
  4. Step 4: Simplify right side
    1,919.99x = 3,330,670.89
  5. Step 5: Solve for x
    x = 3,330,670.89/1,919.99
  6. Step 6: Final answer
    x = 1,734.73

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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.