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Finding the Fourth Proportional to 2,091.08, 3,136.12 and 858.16

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Solution

The fourth proportional to 2,091.08, 3,136.12 and 858.16 is: 1,287.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.08 : 3,136.12 = 858.16 : x
  2. Step 2: Convert to fraction form
    2,091.08/3,136.12 = 858.16/x
  3. Step 3: Cross multiply
    2,091.08x = 3,136.12 × 858.16
  4. Step 4: Simplify right side
    2,091.08x = 2,691,292.74
  5. Step 5: Solve for x
    x = 2,691,292.74/2,091.08
  6. Step 6: Final answer
    x = 1,287.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.