Home / 1,357.18-1,872.62-1,021.44

Finding the Fourth Proportional to 1,357.18, 1,872.62 and 1,021.44

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Solution

The fourth proportional to 1,357.18, 1,872.62 and 1,021.44 is: 1,409.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.18 : 1,872.62 = 1,021.44 : x
  2. Step 2: Convert to fraction form
    1,357.18/1,872.62 = 1,021.44/x
  3. Step 3: Cross multiply
    1,357.18x = 1,872.62 × 1,021.44
  4. Step 4: Simplify right side
    1,357.18x = 1,912,768.97
  5. Step 5: Solve for x
    x = 1,912,768.97/1,357.18
  6. Step 6: Final answer
    x = 1,409.37

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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.