Home / 1,921.66-2,651.10-1,418.72

Finding the Fourth Proportional to 1,921.66, 2,651.10 and 1,418.72

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Solution

The fourth proportional to 1,921.66, 2,651.10 and 1,418.72 is: 1,957.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.66 : 2,651.10 = 1,418.72 : x
  2. Step 2: Convert to fraction form
    1,921.66/2,651.10 = 1,418.72/x
  3. Step 3: Cross multiply
    1,921.66x = 2,651.10 × 1,418.72
  4. Step 4: Simplify right side
    1,921.66x = 3,761,155.34
  5. Step 5: Solve for x
    x = 3,761,155.34/1,921.66
  6. Step 6: Final answer
    x = 1,957.24

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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.