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Finding the Fourth Proportional to 868.36, 1,195.42 and 785.22

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Solution

The fourth proportional to 868.36, 1,195.42 and 785.22 is: 1,080.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.36 : 1,195.42 = 785.22 : x
  2. Step 2: Convert to fraction form
    868.36/1,195.42 = 785.22/x
  3. Step 3: Cross multiply
    868.36x = 1,195.42 × 785.22
  4. Step 4: Simplify right side
    868.36x = 938,667.69
  5. Step 5: Solve for x
    x = 938,667.69/868.36
  6. Step 6: Final answer
    x = 1,080.97

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1.5x scale

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.