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Finding the Fourth Proportional to 786.85, 1,180 and 556.27

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Solution

The fourth proportional to 786.85, 1,180 and 556.27 is: 834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.85 : 1,180 = 556.27 : x
  2. Step 2: Convert to fraction form
    786.85/1,180 = 556.27/x
  3. Step 3: Cross multiply
    786.85x = 1,180 × 556.27
  4. Step 4: Simplify right side
    786.85x = 656,398.60
  5. Step 5: Solve for x
    x = 656,398.60/786.85
  6. Step 6: Final answer
    x = 834.21

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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.