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Finding the Fourth Proportional to 2,912.36, 4,368.98 and 965.00

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Solution

The fourth proportional to 2,912.36, 4,368.98 and 965.00 is: 1,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.36 : 4,368.98 = 965.00 : x
  2. Step 2: Convert to fraction form
    2,912.36/4,368.98 = 965.00/x
  3. Step 3: Cross multiply
    2,912.36x = 4,368.98 × 965.00
  4. Step 4: Simplify right side
    2,912.36x = 4,216,079.03
  5. Step 5: Solve for x
    x = 4,216,079.03/2,912.36
  6. Step 6: Final answer
    x = 1,447.65

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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.