Home / 1,222.19-1,678.48-1,025.36

Finding the Fourth Proportional to 1,222.19, 1,678.48 and 1,025.36

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Solution

The fourth proportional to 1,222.19, 1,678.48 and 1,025.36 is: 1,408.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.19 : 1,678.48 = 1,025.36 : x
  2. Step 2: Convert to fraction form
    1,222.19/1,678.48 = 1,025.36/x
  3. Step 3: Cross multiply
    1,222.19x = 1,678.48 × 1,025.36
  4. Step 4: Simplify right side
    1,222.19x = 1,721,046.25
  5. Step 5: Solve for x
    x = 1,721,046.25/1,222.19
  6. Step 6: Final answer
    x = 1,408.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.