Home / 1,919.20-2,648.71-1,080.11

Finding the Fourth Proportional to 1,919.20, 2,648.71 and 1,080.11

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Solution

The fourth proportional to 1,919.20, 2,648.71 and 1,080.11 is: 1,490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.20 : 2,648.71 = 1,080.11 : x
  2. Step 2: Convert to fraction form
    1,919.20/2,648.71 = 1,080.11/x
  3. Step 3: Cross multiply
    1,919.20x = 2,648.71 × 1,080.11
  4. Step 4: Simplify right side
    1,919.20x = 2,860,882.21
  5. Step 5: Solve for x
    x = 2,860,882.21/1,919.20
  6. Step 6: Final answer
    x = 1,490.67

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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.