Home / 3,309.78-4,965.38-1,118.40

Finding the Fourth Proportional to 3,309.78, 4,965.38 and 1,118.40

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Solution

The fourth proportional to 3,309.78, 4,965.38 and 1,118.40 is: 1,677.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,309.78 : 4,965.38 = 1,118.40 : x
  2. Step 2: Convert to fraction form
    3,309.78/4,965.38 = 1,118.40/x
  3. Step 3: Cross multiply
    3,309.78x = 4,965.38 × 1,118.40
  4. Step 4: Simplify right side
    3,309.78x = 5,553,280.99
  5. Step 5: Solve for x
    x = 5,553,280.99/3,309.78
  6. Step 6: Final answer
    x = 1,677.84

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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.