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Finding the Fourth Proportional to 858.55, 1,286.49 and 599.08

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Solution

The fourth proportional to 858.55, 1,286.49 and 599.08 is: 897.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.55 : 1,286.49 = 599.08 : x
  2. Step 2: Convert to fraction form
    858.55/1,286.49 = 599.08/x
  3. Step 3: Cross multiply
    858.55x = 1,286.49 × 599.08
  4. Step 4: Simplify right side
    858.55x = 770,710.43
  5. Step 5: Solve for x
    x = 770,710.43/858.55
  6. Step 6: Final answer
    x = 897.69

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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.