Home / 3,618.38-5,423.91-1,428.65

Finding the Fourth Proportional to 3,618.38, 5,423.91 and 1,428.65

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Solution

The fourth proportional to 3,618.38, 5,423.91 and 1,428.65 is: 2,141.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.38 : 5,423.91 = 1,428.65 : x
  2. Step 2: Convert to fraction form
    3,618.38/5,423.91 = 1,428.65/x
  3. Step 3: Cross multiply
    3,618.38x = 5,423.91 × 1,428.65
  4. Step 4: Simplify right side
    3,618.38x = 7,748,869.02
  5. Step 5: Solve for x
    x = 7,748,869.02/3,618.38
  6. Step 6: Final answer
    x = 2,141.53

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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.