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Finding the Fourth Proportional to 1,969.79, 2,956.44 and 930.36

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Solution

The fourth proportional to 1,969.79, 2,956.44 and 930.36 is: 1,396.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.79 : 2,956.44 = 930.36 : x
  2. Step 2: Convert to fraction form
    1,969.79/2,956.44 = 930.36/x
  3. Step 3: Cross multiply
    1,969.79x = 2,956.44 × 930.36
  4. Step 4: Simplify right side
    1,969.79x = 2,750,553.52
  5. Step 5: Solve for x
    x = 2,750,553.52/1,969.79
  6. Step 6: Final answer
    x = 1,396.37

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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.