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Finding the Fourth Proportional to 2,185, 3,277.98 and 817

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Solution

The fourth proportional to 2,185, 3,277.98 and 817 is: 1,225.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185 : 3,277.98 = 817 : x
  2. Step 2: Convert to fraction form
    2,185/3,277.98 = 817/x
  3. Step 3: Cross multiply
    2,185x = 3,277.98 × 817
  4. Step 4: Simplify right side
    2,185x = 2,678,109.66
  5. Step 5: Solve for x
    x = 2,678,109.66/2,185
  6. Step 6: Final answer
    x = 1,225.68

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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.