Home / 1,728.54-2,386.13-1,138.05

Finding the Fourth Proportional to 1,728.54, 2,386.13 and 1,138.05

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Solution

The fourth proportional to 1,728.54, 2,386.13 and 1,138.05 is: 1,571.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.54 : 2,386.13 = 1,138.05 : x
  2. Step 2: Convert to fraction form
    1,728.54/2,386.13 = 1,138.05/x
  3. Step 3: Cross multiply
    1,728.54x = 2,386.13 × 1,138.05
  4. Step 4: Simplify right side
    1,728.54x = 2,715,529.56
  5. Step 5: Solve for x
    x = 2,715,529.56/1,728.54
  6. Step 6: Final answer
    x = 1,571.00

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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.