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Finding the Fourth Proportional to 2,939.79, 4,405.79 and 1,554.09

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Solution

The fourth proportional to 2,939.79, 4,405.79 and 1,554.09 is: 2,329.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.79 : 4,405.79 = 1,554.09 : x
  2. Step 2: Convert to fraction form
    2,939.79/4,405.79 = 1,554.09/x
  3. Step 3: Cross multiply
    2,939.79x = 4,405.79 × 1,554.09
  4. Step 4: Simplify right side
    2,939.79x = 6,846,981.54
  5. Step 5: Solve for x
    x = 6,846,981.54/2,939.79
  6. Step 6: Final answer
    x = 2,329.07

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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.