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Finding the Fourth Proportional to 2,605.19, 3,907.95 and 961.85

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Solution

The fourth proportional to 2,605.19, 3,907.95 and 961.85 is: 1,442.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.19 : 3,907.95 = 961.85 : x
  2. Step 2: Convert to fraction form
    2,605.19/3,907.95 = 961.85/x
  3. Step 3: Cross multiply
    2,605.19x = 3,907.95 × 961.85
  4. Step 4: Simplify right side
    2,605.19x = 3,758,842.17
  5. Step 5: Solve for x
    x = 3,758,842.17/2,605.19
  6. Step 6: Final answer
    x = 1,442.83

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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.