Home / 2,421.98-3,629.31-1,121.92

Finding the Fourth Proportional to 2,421.98, 3,629.31 and 1,121.92

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Solution

The fourth proportional to 2,421.98, 3,629.31 and 1,121.92 is: 1,681.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.98 : 3,629.31 = 1,121.92 : x
  2. Step 2: Convert to fraction form
    2,421.98/3,629.31 = 1,121.92/x
  3. Step 3: Cross multiply
    2,421.98x = 3,629.31 × 1,121.92
  4. Step 4: Simplify right side
    2,421.98x = 4,071,795.48
  5. Step 5: Solve for x
    x = 4,071,795.48/2,421.98
  6. Step 6: Final answer
    x = 1,681.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.