Home / 1,736.40-2,605.56-640.62

Finding the Fourth Proportional to 1,736.40, 2,605.56 and 640.62

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Solution

The fourth proportional to 1,736.40, 2,605.56 and 640.62 is: 961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,736.40 : 2,605.56 = 640.62 : x
  2. Step 2: Convert to fraction form
    1,736.40/2,605.56 = 640.62/x
  3. Step 3: Cross multiply
    1,736.40x = 2,605.56 × 640.62
  4. Step 4: Simplify right side
    1,736.40x = 1,669,173.85
  5. Step 5: Solve for x
    x = 1,669,173.85/1,736.40
  6. Step 6: Final answer
    x = 961.28

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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.