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Finding the Fourth Proportional to 1,968.56, 2,952.84 and 670

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Solution

The fourth proportional to 1,968.56, 2,952.84 and 670 is: 1,005

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.56 : 2,952.84 = 670 : x
  2. Step 2: Convert to fraction form
    1,968.56/2,952.84 = 670/x
  3. Step 3: Cross multiply
    1,968.56x = 2,952.84 × 670
  4. Step 4: Simplify right side
    1,968.56x = 1,978,402.80
  5. Step 5: Solve for x
    x = 1,978,402.80/1,968.56
  6. Step 6: Final answer
    x = 1,005

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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.