Home / 1,511.15-2,085.39-838.96

Finding the Fourth Proportional to 1,511.15, 2,085.39 and 838.96

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Solution

The fourth proportional to 1,511.15, 2,085.39 and 838.96 is: 1,157.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.15 : 2,085.39 = 838.96 : x
  2. Step 2: Convert to fraction form
    1,511.15/2,085.39 = 838.96/x
  3. Step 3: Cross multiply
    1,511.15x = 2,085.39 × 838.96
  4. Step 4: Simplify right side
    1,511.15x = 1,749,548.37
  5. Step 5: Solve for x
    x = 1,749,548.37/1,511.15
  6. Step 6: Final answer
    x = 1,157.76

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1.5x scale

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.