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Finding the Fourth Proportional to 2,673.93, 3,690.21 and 1,555.20

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Solution

The fourth proportional to 2,673.93, 3,690.21 and 1,555.20 is: 2,146.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,673.93 : 3,690.21 = 1,555.20 : x
  2. Step 2: Convert to fraction form
    2,673.93/3,690.21 = 1,555.20/x
  3. Step 3: Cross multiply
    2,673.93x = 3,690.21 × 1,555.20
  4. Step 4: Simplify right side
    2,673.93x = 5,739,014.59
  5. Step 5: Solve for x
    x = 5,739,014.59/2,673.93
  6. Step 6: Final answer
    x = 2,146.28

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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.