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Finding the Fourth Proportional to 3,083.68, 4,625.16 and 775

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Solution

The fourth proportional to 3,083.68, 4,625.16 and 775 is: 1,162.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,083.68 : 4,625.16 = 775 : x
  2. Step 2: Convert to fraction form
    3,083.68/4,625.16 = 775/x
  3. Step 3: Cross multiply
    3,083.68x = 4,625.16 × 775
  4. Step 4: Simplify right side
    3,083.68x = 3,584,499
  5. Step 5: Solve for x
    x = 3,584,499/3,083.68
  6. Step 6: Final answer
    x = 1,162.41

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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.