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Finding the Fourth Proportional to 764.56, 1,054.96 and 484.75

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Solution

The fourth proportional to 764.56, 1,054.96 and 484.75 is: 668.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.56 : 1,054.96 = 484.75 : x
  2. Step 2: Convert to fraction form
    764.56/1,054.96 = 484.75/x
  3. Step 3: Cross multiply
    764.56x = 1,054.96 × 484.75
  4. Step 4: Simplify right side
    764.56x = 511,391.86
  5. Step 5: Solve for x
    x = 511,391.86/764.56
  6. Step 6: Final answer
    x = 668.87

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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.