Home / 1,121.07-1,548.62-1,021.32

Finding the Fourth Proportional to 1,121.07, 1,548.62 and 1,021.32

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Solution

The fourth proportional to 1,121.07, 1,548.62 and 1,021.32 is: 1,410.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.07 : 1,548.62 = 1,021.32 : x
  2. Step 2: Convert to fraction form
    1,121.07/1,548.62 = 1,021.32/x
  3. Step 3: Cross multiply
    1,121.07x = 1,548.62 × 1,021.32
  4. Step 4: Simplify right side
    1,121.07x = 1,581,636.58
  5. Step 5: Solve for x
    x = 1,581,636.58/1,121.07
  6. Step 6: Final answer
    x = 1,410.83

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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.