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Finding the Fourth Proportional to 4,986, 7,480.80 and 1,699.20

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Solution

The fourth proportional to 4,986, 7,480.80 and 1,699.20 is: 2,549.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986 : 7,480.80 = 1,699.20 : x
  2. Step 2: Convert to fraction form
    4,986/7,480.80 = 1,699.20/x
  3. Step 3: Cross multiply
    4,986x = 7,480.80 × 1,699.20
  4. Step 4: Simplify right side
    4,986x = 12,711,375.36
  5. Step 5: Solve for x
    x = 12,711,375.36/4,986
  6. Step 6: Final answer
    x = 2,549.41

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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.