Home / 1,919.25-2,648.34-1,080

Finding the Fourth Proportional to 1,919.25, 2,648.34 and 1,080

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Solution

The fourth proportional to 1,919.25, 2,648.34 and 1,080 is: 1,490.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.25 : 2,648.34 = 1,080 : x
  2. Step 2: Convert to fraction form
    1,919.25/2,648.34 = 1,080/x
  3. Step 3: Cross multiply
    1,919.25x = 2,648.34 × 1,080
  4. Step 4: Simplify right side
    1,919.25x = 2,860,207.20
  5. Step 5: Solve for x
    x = 2,860,207.20/1,919.25
  6. Step 6: Final answer
    x = 1,490.27

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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.