Home / 1,121.24-1,681.67-299.60

Finding the Fourth Proportional to 1,121.24, 1,681.67 and 299.60

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Solution

The fourth proportional to 1,121.24, 1,681.67 and 299.60 is: 449.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.24 : 1,681.67 = 299.60 : x
  2. Step 2: Convert to fraction form
    1,121.24/1,681.67 = 299.60/x
  3. Step 3: Cross multiply
    1,121.24x = 1,681.67 × 299.60
  4. Step 4: Simplify right side
    1,121.24x = 503,828.33
  5. Step 5: Solve for x
    x = 503,828.33/1,121.24
  6. Step 6: Final answer
    x = 449.35

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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.