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Finding the Fourth Proportional to 857.92, 1,286.88 and 584.68

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Solution

The fourth proportional to 857.92, 1,286.88 and 584.68 is: 877.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.92 : 1,286.88 = 584.68 : x
  2. Step 2: Convert to fraction form
    857.92/1,286.88 = 584.68/x
  3. Step 3: Cross multiply
    857.92x = 1,286.88 × 584.68
  4. Step 4: Simplify right side
    857.92x = 752,413.00
  5. Step 5: Solve for x
    x = 752,413.00/857.92
  6. Step 6: Final answer
    x = 877.02

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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.