Home / 1,919.40-2,648.64-1,211.34

Finding the Fourth Proportional to 1,919.40, 2,648.64 and 1,211.34

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Solution

The fourth proportional to 1,919.40, 2,648.64 and 1,211.34 is: 1,671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.40 : 2,648.64 = 1,211.34 : x
  2. Step 2: Convert to fraction form
    1,919.40/2,648.64 = 1,211.34/x
  3. Step 3: Cross multiply
    1,919.40x = 2,648.64 × 1,211.34
  4. Step 4: Simplify right side
    1,919.40x = 3,208,403.58
  5. Step 5: Solve for x
    x = 3,208,403.58/1,919.40
  6. Step 6: Final answer
    x = 1,671.57

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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.