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Finding the Fourth Proportional to 3,668.68, 5,062.75 and 1,990.07

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Solution

The fourth proportional to 3,668.68, 5,062.75 and 1,990.07 is: 2,746.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,668.68 : 5,062.75 = 1,990.07 : x
  2. Step 2: Convert to fraction form
    3,668.68/5,062.75 = 1,990.07/x
  3. Step 3: Cross multiply
    3,668.68x = 5,062.75 × 1,990.07
  4. Step 4: Simplify right side
    3,668.68x = 10,075,226.89
  5. Step 5: Solve for x
    x = 10,075,226.89/3,668.68
  6. Step 6: Final answer
    x = 2,746.28

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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.