Home / 1,821.44-2,511.86-1,225.28

Finding the Fourth Proportional to 1,821.44, 2,511.86 and 1,225.28

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Solution

The fourth proportional to 1,821.44, 2,511.86 and 1,225.28 is: 1,689.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.44 : 2,511.86 = 1,225.28 : x
  2. Step 2: Convert to fraction form
    1,821.44/2,511.86 = 1,225.28/x
  3. Step 3: Cross multiply
    1,821.44x = 2,511.86 × 1,225.28
  4. Step 4: Simplify right side
    1,821.44x = 3,077,731.82
  5. Step 5: Solve for x
    x = 3,077,731.82/1,821.44
  6. Step 6: Final answer
    x = 1,689.72

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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.