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Finding the Fourth Proportional to 1,868.91, 2,804.31 and 774.06

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Solution

The fourth proportional to 1,868.91, 2,804.31 and 774.06 is: 1,161.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.91 : 2,804.31 = 774.06 : x
  2. Step 2: Convert to fraction form
    1,868.91/2,804.31 = 774.06/x
  3. Step 3: Cross multiply
    1,868.91x = 2,804.31 × 774.06
  4. Step 4: Simplify right side
    1,868.91x = 2,170,704.20
  5. Step 5: Solve for x
    x = 2,170,704.20/1,868.91
  6. Step 6: Final answer
    x = 1,161.48

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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.