Home / 1,211.24-1,817.01-389.22

Finding the Fourth Proportional to 1,211.24, 1,817.01 and 389.22

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Solution

The fourth proportional to 1,211.24, 1,817.01 and 389.22 is: 583.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.24 : 1,817.01 = 389.22 : x
  2. Step 2: Convert to fraction form
    1,211.24/1,817.01 = 389.22/x
  3. Step 3: Cross multiply
    1,211.24x = 1,817.01 × 389.22
  4. Step 4: Simplify right side
    1,211.24x = 707,216.63
  5. Step 5: Solve for x
    x = 707,216.63/1,211.24
  6. Step 6: Final answer
    x = 583.88

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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.