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Finding the Fourth Proportional to 2,090.98, 3,136.02 and 857.18

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Solution

The fourth proportional to 2,090.98, 3,136.02 and 857.18 is: 1,285.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.98 : 3,136.02 = 857.18 : x
  2. Step 2: Convert to fraction form
    2,090.98/3,136.02 = 857.18/x
  3. Step 3: Cross multiply
    2,090.98x = 3,136.02 × 857.18
  4. Step 4: Simplify right side
    2,090.98x = 2,688,133.62
  5. Step 5: Solve for x
    x = 2,688,133.62/2,090.98
  6. Step 6: Final answer
    x = 1,285.59

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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.