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Finding the Fourth Proportional to 2,790.74, 4,184.89 and 842.49

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Solution

The fourth proportional to 2,790.74, 4,184.89 and 842.49 is: 1,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.74 : 4,184.89 = 842.49 : x
  2. Step 2: Convert to fraction form
    2,790.74/4,184.89 = 842.49/x
  3. Step 3: Cross multiply
    2,790.74x = 4,184.89 × 842.49
  4. Step 4: Simplify right side
    2,790.74x = 3,525,725.87
  5. Step 5: Solve for x
    x = 3,525,725.87/2,790.74
  6. Step 6: Final answer
    x = 1,263.36

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1.5x scale

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.