Home / 1,539.78-2,310.21-961.98

Finding the Fourth Proportional to 1,539.78, 2,310.21 and 961.98

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Solution

The fourth proportional to 1,539.78, 2,310.21 and 961.98 is: 1,443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.78 : 2,310.21 = 961.98 : x
  2. Step 2: Convert to fraction form
    1,539.78/2,310.21 = 961.98/x
  3. Step 3: Cross multiply
    1,539.78x = 2,310.21 × 961.98
  4. Step 4: Simplify right side
    1,539.78x = 2,222,375.82
  5. Step 5: Solve for x
    x = 2,222,375.82/1,539.78
  6. Step 6: Final answer
    x = 1,443.31

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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.