Home / 1,919.78-2,649.73-1,359.66

Finding the Fourth Proportional to 1,919.78, 2,649.73 and 1,359.66

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Solution

The fourth proportional to 1,919.78, 2,649.73 and 1,359.66 is: 1,876.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.78 : 2,649.73 = 1,359.66 : x
  2. Step 2: Convert to fraction form
    1,919.78/2,649.73 = 1,359.66/x
  3. Step 3: Cross multiply
    1,919.78x = 2,649.73 × 1,359.66
  4. Step 4: Simplify right side
    1,919.78x = 3,602,731.89
  5. Step 5: Solve for x
    x = 3,602,731.89/1,919.78
  6. Step 6: Final answer
    x = 1,876.64

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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.