Home / 1,919.90-2,649.38-1,175.11

Finding the Fourth Proportional to 1,919.90, 2,649.38 and 1,175.11

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Solution

The fourth proportional to 1,919.90, 2,649.38 and 1,175.11 is: 1,621.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.90 : 2,649.38 = 1,175.11 : x
  2. Step 2: Convert to fraction form
    1,919.90/2,649.38 = 1,175.11/x
  3. Step 3: Cross multiply
    1,919.90x = 2,649.38 × 1,175.11
  4. Step 4: Simplify right side
    1,919.90x = 3,113,300.43
  5. Step 5: Solve for x
    x = 3,113,300.43/1,919.90
  6. Step 6: Final answer
    x = 1,621.59

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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.