Home / 1,899.21-2,620.89-1,113.11

Finding the Fourth Proportional to 1,899.21, 2,620.89 and 1,113.11

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Solution

The fourth proportional to 1,899.21, 2,620.89 and 1,113.11 is: 1,536.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.21 : 2,620.89 = 1,113.11 : x
  2. Step 2: Convert to fraction form
    1,899.21/2,620.89 = 1,113.11/x
  3. Step 3: Cross multiply
    1,899.21x = 2,620.89 × 1,113.11
  4. Step 4: Simplify right side
    1,899.21x = 2,917,325.76
  5. Step 5: Solve for x
    x = 2,917,325.76/1,899.21
  6. Step 6: Final answer
    x = 1,536.07

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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.