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Finding the Fourth Proportional to 2,978.28, 4,110 and 1,719.60

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Solution

The fourth proportional to 2,978.28, 4,110 and 1,719.60 is: 2,373.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978.28 : 4,110 = 1,719.60 : x
  2. Step 2: Convert to fraction form
    2,978.28/4,110 = 1,719.60/x
  3. Step 3: Cross multiply
    2,978.28x = 4,110 × 1,719.60
  4. Step 4: Simplify right side
    2,978.28x = 7,067,556
  5. Step 5: Solve for x
    x = 7,067,556/2,978.28
  6. Step 6: Final answer
    x = 2,373.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.