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Finding the Fourth Proportional to 1,645.48, 2,468.70 and 961

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Solution

The fourth proportional to 1,645.48, 2,468.70 and 961 is: 1,441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.48 : 2,468.70 = 961 : x
  2. Step 2: Convert to fraction form
    1,645.48/2,468.70 = 961/x
  3. Step 3: Cross multiply
    1,645.48x = 2,468.70 × 961
  4. Step 4: Simplify right side
    1,645.48x = 2,372,420.70
  5. Step 5: Solve for x
    x = 2,372,420.70/1,645.48
  6. Step 6: Final answer
    x = 1,441.78

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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.