Home / 1,511.11-2,085.31-847.99

Finding the Fourth Proportional to 1,511.11, 2,085.31 and 847.99

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Solution

The fourth proportional to 1,511.11, 2,085.31 and 847.99 is: 1,170.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.11 : 2,085.31 = 847.99 : x
  2. Step 2: Convert to fraction form
    1,511.11/2,085.31 = 847.99/x
  3. Step 3: Cross multiply
    1,511.11x = 2,085.31 × 847.99
  4. Step 4: Simplify right side
    1,511.11x = 1,768,322.03
  5. Step 5: Solve for x
    x = 1,768,322.03/1,511.11
  6. Step 6: Final answer
    x = 1,170.21

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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.