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Finding the Fourth Proportional to 5,279.03, 7,918.54 and 4,290.65

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Solution

The fourth proportional to 5,279.03, 7,918.54 and 4,290.65 is: 6,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.03 : 7,918.54 = 4,290.65 : x
  2. Step 2: Convert to fraction form
    5,279.03/7,918.54 = 4,290.65/x
  3. Step 3: Cross multiply
    5,279.03x = 7,918.54 × 4,290.65
  4. Step 4: Simplify right side
    5,279.03x = 33,975,633.33
  5. Step 5: Solve for x
    x = 33,975,633.33/5,279.03
  6. Step 6: Final answer
    x = 6,435.97

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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.