Home / 3,586.40-5,379.18-1,121

Finding the Fourth Proportional to 3,586.40, 5,379.18 and 1,121

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Solution

The fourth proportional to 3,586.40, 5,379.18 and 1,121 is: 1,681.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.40 : 5,379.18 = 1,121 : x
  2. Step 2: Convert to fraction form
    3,586.40/5,379.18 = 1,121/x
  3. Step 3: Cross multiply
    3,586.40x = 5,379.18 × 1,121
  4. Step 4: Simplify right side
    3,586.40x = 6,030,060.78
  5. Step 5: Solve for x
    x = 6,030,060.78/3,586.40
  6. Step 6: Final answer
    x = 1,681.37

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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.