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Finding the Fourth Proportional to 3,668.81, 5,062.93 and 1,990.18

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Solution

The fourth proportional to 3,668.81, 5,062.93 and 1,990.18 is: 2,746.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,668.81 : 5,062.93 = 1,990.18 : x
  2. Step 2: Convert to fraction form
    3,668.81/5,062.93 = 1,990.18/x
  3. Step 3: Cross multiply
    3,668.81x = 5,062.93 × 1,990.18
  4. Step 4: Simplify right side
    3,668.81x = 10,076,142.03
  5. Step 5: Solve for x
    x = 10,076,142.03/3,668.81
  6. Step 6: Final answer
    x = 2,746.43

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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.