Home / 3,621.61-5,428.77-1,428.69

Finding the Fourth Proportional to 3,621.61, 5,428.77 and 1,428.69

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Solution

The fourth proportional to 3,621.61, 5,428.77 and 1,428.69 is: 2,141.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.61 : 5,428.77 = 1,428.69 : x
  2. Step 2: Convert to fraction form
    3,621.61/5,428.77 = 1,428.69/x
  3. Step 3: Cross multiply
    3,621.61x = 5,428.77 × 1,428.69
  4. Step 4: Simplify right side
    3,621.61x = 7,756,021.91
  5. Step 5: Solve for x
    x = 7,756,021.91/3,621.61
  6. Step 6: Final answer
    x = 2,141.59

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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.