Home / 1,919.07-2,648.63-1,211.30

Finding the Fourth Proportional to 1,919.07, 2,648.63 and 1,211.30

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Solution

The fourth proportional to 1,919.07, 2,648.63 and 1,211.30 is: 1,671.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.07 : 2,648.63 = 1,211.30 : x
  2. Step 2: Convert to fraction form
    1,919.07/2,648.63 = 1,211.30/x
  3. Step 3: Cross multiply
    1,919.07x = 2,648.63 × 1,211.30
  4. Step 4: Simplify right side
    1,919.07x = 3,208,285.24
  5. Step 5: Solve for x
    x = 3,208,285.24/1,919.07
  6. Step 6: Final answer
    x = 1,671.79

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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.