Home / 1,025.40-1,414.56-745.20

Finding the Fourth Proportional to 1,025.40, 1,414.56 and 745.20

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Solution

The fourth proportional to 1,025.40, 1,414.56 and 745.20 is: 1,028.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.40 : 1,414.56 = 745.20 : x
  2. Step 2: Convert to fraction form
    1,025.40/1,414.56 = 745.20/x
  3. Step 3: Cross multiply
    1,025.40x = 1,414.56 × 745.20
  4. Step 4: Simplify right side
    1,025.40x = 1,054,130.11
  5. Step 5: Solve for x
    x = 1,054,130.11/1,025.40
  6. Step 6: Final answer
    x = 1,028.02

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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.