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Finding the Fourth Proportional to 3,309.95, 4,965.64 and 1,118.63

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Solution

The fourth proportional to 3,309.95, 4,965.64 and 1,118.63 is: 1,678.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,309.95 : 4,965.64 = 1,118.63 : x
  2. Step 2: Convert to fraction form
    3,309.95/4,965.64 = 1,118.63/x
  3. Step 3: Cross multiply
    3,309.95x = 4,965.64 × 1,118.63
  4. Step 4: Simplify right side
    3,309.95x = 5,554,729.78
  5. Step 5: Solve for x
    x = 5,554,729.78/3,309.95
  6. Step 6: Final answer
    x = 1,678.19

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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.