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Finding the Fourth Proportional to 780.22, 1,075.44 and 736.48

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Solution

The fourth proportional to 780.22, 1,075.44 and 736.48 is: 1,015.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.22 : 1,075.44 = 736.48 : x
  2. Step 2: Convert to fraction form
    780.22/1,075.44 = 736.48/x
  3. Step 3: Cross multiply
    780.22x = 1,075.44 × 736.48
  4. Step 4: Simplify right side
    780.22x = 792,040.05
  5. Step 5: Solve for x
    x = 792,040.05/780.22
  6. Step 6: Final answer
    x = 1,015.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.