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Finding the Fourth Proportional to 2,781.54, 3,837.78 and 1,719.29

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Solution

The fourth proportional to 2,781.54, 3,837.78 and 1,719.29 is: 2,372.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.54 : 3,837.78 = 1,719.29 : x
  2. Step 2: Convert to fraction form
    2,781.54/3,837.78 = 1,719.29/x
  3. Step 3: Cross multiply
    2,781.54x = 3,837.78 × 1,719.29
  4. Step 4: Simplify right side
    2,781.54x = 6,598,266.37
  5. Step 5: Solve for x
    x = 6,598,266.37/2,781.54
  6. Step 6: Final answer
    x = 2,372.16

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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.