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Finding the Fourth Proportional to 1,979.39, 2,969.16 and 746.77

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Solution

The fourth proportional to 1,979.39, 2,969.16 and 746.77 is: 1,120.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.39 : 2,969.16 = 746.77 : x
  2. Step 2: Convert to fraction form
    1,979.39/2,969.16 = 746.77/x
  3. Step 3: Cross multiply
    1,979.39x = 2,969.16 × 746.77
  4. Step 4: Simplify right side
    1,979.39x = 2,217,274.96
  5. Step 5: Solve for x
    x = 2,217,274.96/1,979.39
  6. Step 6: Final answer
    x = 1,120.18

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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.