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Finding the Fourth Proportional to 1,980.12, 2,968.88 and 746.04

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Solution

The fourth proportional to 1,980.12, 2,968.88 and 746.04 is: 1,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.12 : 2,968.88 = 746.04 : x
  2. Step 2: Convert to fraction form
    1,980.12/2,968.88 = 746.04/x
  3. Step 3: Cross multiply
    1,980.12x = 2,968.88 × 746.04
  4. Step 4: Simplify right side
    1,980.12x = 2,214,899.51
  5. Step 5: Solve for x
    x = 2,214,899.51/1,980.12
  6. Step 6: Final answer
    x = 1,118.57

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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.