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Finding the Fourth Proportional to 5,179.98, 7,763.48 and 4,080

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Solution

The fourth proportional to 5,179.98, 7,763.48 and 4,080 is: 6,114.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.98 : 7,763.48 = 4,080 : x
  2. Step 2: Convert to fraction form
    5,179.98/7,763.48 = 4,080/x
  3. Step 3: Cross multiply
    5,179.98x = 7,763.48 × 4,080
  4. Step 4: Simplify right side
    5,179.98x = 31,674,998.40
  5. Step 5: Solve for x
    x = 31,674,998.40/5,179.98
  6. Step 6: Final answer
    x = 6,114.89

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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.