Home / 3,618.14-5,428.90-1,279.91

Finding the Fourth Proportional to 3,618.14, 5,428.90 and 1,279.91

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Solution

The fourth proportional to 3,618.14, 5,428.90 and 1,279.91 is: 1,920.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.14 : 5,428.90 = 1,279.91 : x
  2. Step 2: Convert to fraction form
    3,618.14/5,428.90 = 1,279.91/x
  3. Step 3: Cross multiply
    3,618.14x = 5,428.90 × 1,279.91
  4. Step 4: Simplify right side
    3,618.14x = 6,948,503.40
  5. Step 5: Solve for x
    x = 6,948,503.40/3,618.14
  6. Step 6: Final answer
    x = 1,920.46

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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.