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Finding the Fourth Proportional to 858.68, 1,185.66 and 793.16

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Solution

The fourth proportional to 858.68, 1,185.66 and 793.16 is: 1,095.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.68 : 1,185.66 = 793.16 : x
  2. Step 2: Convert to fraction form
    858.68/1,185.66 = 793.16/x
  3. Step 3: Cross multiply
    858.68x = 1,185.66 × 793.16
  4. Step 4: Simplify right side
    858.68x = 940,418.09
  5. Step 5: Solve for x
    x = 940,418.09/858.68
  6. Step 6: Final answer
    x = 1,095.19

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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.