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Finding the Fourth Proportional to 2,090.80, 3,136.08 and 629.92

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Solution

The fourth proportional to 2,090.80, 3,136.08 and 629.92 is: 944.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.80 : 3,136.08 = 629.92 : x
  2. Step 2: Convert to fraction form
    2,090.80/3,136.08 = 629.92/x
  3. Step 3: Cross multiply
    2,090.80x = 3,136.08 × 629.92
  4. Step 4: Simplify right side
    2,090.80x = 1,975,479.51
  5. Step 5: Solve for x
    x = 1,975,479.51/2,090.80
  6. Step 6: Final answer
    x = 944.84

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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.