Home / 1,511.08-2,085.26-838.88

Finding the Fourth Proportional to 1,511.08, 2,085.26 and 838.88

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Solution

The fourth proportional to 1,511.08, 2,085.26 and 838.88 is: 1,157.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.08 : 2,085.26 = 838.88 : x
  2. Step 2: Convert to fraction form
    1,511.08/2,085.26 = 838.88/x
  3. Step 3: Cross multiply
    1,511.08x = 2,085.26 × 838.88
  4. Step 4: Simplify right side
    1,511.08x = 1,749,277.89
  5. Step 5: Solve for x
    x = 1,749,277.89/1,511.08
  6. Step 6: Final answer
    x = 1,157.64

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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.