Home / 1,121.07-1,681.44-299.42

Finding the Fourth Proportional to 1,121.07, 1,681.44 and 299.42

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Solution

The fourth proportional to 1,121.07, 1,681.44 and 299.42 is: 449.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.07 : 1,681.44 = 299.42 : x
  2. Step 2: Convert to fraction form
    1,121.07/1,681.44 = 299.42/x
  3. Step 3: Cross multiply
    1,121.07x = 1,681.44 × 299.42
  4. Step 4: Simplify right side
    1,121.07x = 503,448.36
  5. Step 5: Solve for x
    x = 503,448.36/1,121.07
  6. Step 6: Final answer
    x = 449.08

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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.