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Finding the Fourth Proportional to 2,555.88, 3,833.82 and 776.95

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Solution

The fourth proportional to 2,555.88, 3,833.82 and 776.95 is: 1,165.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,555.88 : 3,833.82 = 776.95 : x
  2. Step 2: Convert to fraction form
    2,555.88/3,833.82 = 776.95/x
  3. Step 3: Cross multiply
    2,555.88x = 3,833.82 × 776.95
  4. Step 4: Simplify right side
    2,555.88x = 2,978,686.45
  5. Step 5: Solve for x
    x = 2,978,686.45/2,555.88
  6. Step 6: Final answer
    x = 1,165.43

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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.