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Finding the Fourth Proportional to 764.67, 1,055.25 and 415.37

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Solution

The fourth proportional to 764.67, 1,055.25 and 415.37 is: 573.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.67 : 1,055.25 = 415.37 : x
  2. Step 2: Convert to fraction form
    764.67/1,055.25 = 415.37/x
  3. Step 3: Cross multiply
    764.67x = 1,055.25 × 415.37
  4. Step 4: Simplify right side
    764.67x = 438,313.92
  5. Step 5: Solve for x
    x = 438,313.92/764.67
  6. Step 6: Final answer
    x = 573.21

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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.