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Finding the Fourth Proportional to 1,783.69, 2,674.21 and 858.37

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Solution

The fourth proportional to 1,783.69, 2,674.21 and 858.37 is: 1,286.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.69 : 2,674.21 = 858.37 : x
  2. Step 2: Convert to fraction form
    1,783.69/2,674.21 = 858.37/x
  3. Step 3: Cross multiply
    1,783.69x = 2,674.21 × 858.37
  4. Step 4: Simplify right side
    1,783.69x = 2,295,461.64
  5. Step 5: Solve for x
    x = 2,295,461.64/1,783.69
  6. Step 6: Final answer
    x = 1,286.92

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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.