Home / 1,919.85-2,648.70-1,257.08

Finding the Fourth Proportional to 1,919.85, 2,648.70 and 1,257.08

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Solution

The fourth proportional to 1,919.85, 2,648.70 and 1,257.08 is: 1,734.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.85 : 2,648.70 = 1,257.08 : x
  2. Step 2: Convert to fraction form
    1,919.85/2,648.70 = 1,257.08/x
  3. Step 3: Cross multiply
    1,919.85x = 2,648.70 × 1,257.08
  4. Step 4: Simplify right side
    1,919.85x = 3,329,627.80
  5. Step 5: Solve for x
    x = 3,329,627.80/1,919.85
  6. Step 6: Final answer
    x = 1,734.32

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1.5x scale

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.