Home / 1,728.94-2,386.74-1,020.55

Finding the Fourth Proportional to 1,728.94, 2,386.74 and 1,020.55

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Solution

The fourth proportional to 1,728.94, 2,386.74 and 1,020.55 is: 1,408.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.94 : 2,386.74 = 1,020.55 : x
  2. Step 2: Convert to fraction form
    1,728.94/2,386.74 = 1,020.55/x
  3. Step 3: Cross multiply
    1,728.94x = 2,386.74 × 1,020.55
  4. Step 4: Simplify right side
    1,728.94x = 2,435,787.51
  5. Step 5: Solve for x
    x = 2,435,787.51/1,728.94
  6. Step 6: Final answer
    x = 1,408.83

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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.