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Finding the Fourth Proportional to 857.29, 1,183.19 and 484.42

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Solution

The fourth proportional to 857.29, 1,183.19 and 484.42 is: 668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.29 : 1,183.19 = 484.42 : x
  2. Step 2: Convert to fraction form
    857.29/1,183.19 = 484.42/x
  3. Step 3: Cross multiply
    857.29x = 1,183.19 × 484.42
  4. Step 4: Simplify right side
    857.29x = 573,158.48
  5. Step 5: Solve for x
    x = 573,158.48/857.29
  6. Step 6: Final answer
    x = 668.57

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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.