Home / 1,921.02-2,650.95-1,399.26

Finding the Fourth Proportional to 1,921.02, 2,650.95 and 1,399.26

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Solution

The fourth proportional to 1,921.02, 2,650.95 and 1,399.26 is: 1,930.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.02 : 2,650.95 = 1,399.26 : x
  2. Step 2: Convert to fraction form
    1,921.02/2,650.95 = 1,399.26/x
  3. Step 3: Cross multiply
    1,921.02x = 2,650.95 × 1,399.26
  4. Step 4: Simplify right side
    1,921.02x = 3,709,368.30
  5. Step 5: Solve for x
    x = 3,709,368.30/1,921.02
  6. Step 6: Final answer
    x = 1,930.94

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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.