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Finding the Fourth Proportional to 855.07, 1,282.60 and 846.56

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Solution

The fourth proportional to 855.07, 1,282.60 and 846.56 is: 1,269.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.07 : 1,282.60 = 846.56 : x
  2. Step 2: Convert to fraction form
    855.07/1,282.60 = 846.56/x
  3. Step 3: Cross multiply
    855.07x = 1,282.60 × 846.56
  4. Step 4: Simplify right side
    855.07x = 1,085,797.86
  5. Step 5: Solve for x
    x = 1,085,797.86/855.07
  6. Step 6: Final answer
    x = 1,269.84

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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.