Home / 1,025.90-1,415.25-745.70

Finding the Fourth Proportional to 1,025.90, 1,415.25 and 745.70

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Solution

The fourth proportional to 1,025.90, 1,415.25 and 745.70 is: 1,028.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.90 : 1,415.25 = 745.70 : x
  2. Step 2: Convert to fraction form
    1,025.90/1,415.25 = 745.70/x
  3. Step 3: Cross multiply
    1,025.90x = 1,415.25 × 745.70
  4. Step 4: Simplify right side
    1,025.90x = 1,055,351.93
  5. Step 5: Solve for x
    x = 1,055,351.93/1,025.90
  6. Step 6: Final answer
    x = 1,028.71

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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.