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Finding the Fourth Proportional to 5,279.63, 7,919.45 and 1,816.88

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Solution

The fourth proportional to 5,279.63, 7,919.45 and 1,816.88 is: 2,725.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.63 : 7,919.45 = 1,816.88 : x
  2. Step 2: Convert to fraction form
    5,279.63/7,919.45 = 1,816.88/x
  3. Step 3: Cross multiply
    5,279.63x = 7,919.45 × 1,816.88
  4. Step 4: Simplify right side
    5,279.63x = 14,388,690.32
  5. Step 5: Solve for x
    x = 14,388,690.32/5,279.63
  6. Step 6: Final answer
    x = 2,725.32

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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.