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Finding the Fourth Proportional to 867.93, 1,198.30 and 774.51

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Solution

The fourth proportional to 867.93, 1,198.30 and 774.51 is: 1,069.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.93 : 1,198.30 = 774.51 : x
  2. Step 2: Convert to fraction form
    867.93/1,198.30 = 774.51/x
  3. Step 3: Cross multiply
    867.93x = 1,198.30 × 774.51
  4. Step 4: Simplify right side
    867.93x = 928,091.10
  5. Step 5: Solve for x
    x = 928,091.10/867.93
  6. Step 6: Final answer
    x = 1,069.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.