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Finding the Fourth Proportional to 1,863.36, 2,781.48 and 1,728.24

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Solution

The fourth proportional to 1,863.36, 2,781.48 and 1,728.24 is: 2,579.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.36 : 2,781.48 = 1,728.24 : x
  2. Step 2: Convert to fraction form
    1,863.36/2,781.48 = 1,728.24/x
  3. Step 3: Cross multiply
    1,863.36x = 2,781.48 × 1,728.24
  4. Step 4: Simplify right side
    1,863.36x = 4,807,065.00
  5. Step 5: Solve for x
    x = 4,807,065.00/1,863.36
  6. Step 6: Final answer
    x = 2,579.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.