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Finding the Fourth Proportional to 5,979.69, 8,965.69 and 2,859.63

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Solution

The fourth proportional to 5,979.69, 8,965.69 and 2,859.63 is: 4,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,979.69 : 8,965.69 = 2,859.63 : x
  2. Step 2: Convert to fraction form
    5,979.69/8,965.69 = 2,859.63/x
  3. Step 3: Cross multiply
    5,979.69x = 8,965.69 × 2,859.63
  4. Step 4: Simplify right side
    5,979.69x = 25,638,541.80
  5. Step 5: Solve for x
    x = 25,638,541.80/5,979.69
  6. Step 6: Final answer
    x = 4,287.60

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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.