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Finding the Fourth Proportional to 1,320.54, 1,980.36 and 736.44

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Solution

The fourth proportional to 1,320.54, 1,980.36 and 736.44 is: 1,104.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.54 : 1,980.36 = 736.44 : x
  2. Step 2: Convert to fraction form
    1,320.54/1,980.36 = 736.44/x
  3. Step 3: Cross multiply
    1,320.54x = 1,980.36 × 736.44
  4. Step 4: Simplify right side
    1,320.54x = 1,458,416.32
  5. Step 5: Solve for x
    x = 1,458,416.32/1,320.54
  6. Step 6: Final answer
    x = 1,104.41

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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.