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Finding the Fourth Proportional to 1,969.34, 2,954.37 and 815.18

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Solution

The fourth proportional to 1,969.34, 2,954.37 and 815.18 is: 1,222.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.34 : 2,954.37 = 815.18 : x
  2. Step 2: Convert to fraction form
    1,969.34/2,954.37 = 815.18/x
  3. Step 3: Cross multiply
    1,969.34x = 2,954.37 × 815.18
  4. Step 4: Simplify right side
    1,969.34x = 2,408,343.34
  5. Step 5: Solve for x
    x = 2,408,343.34/1,969.34
  6. Step 6: Final answer
    x = 1,222.92

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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.