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Finding the Fourth Proportional to 764.52, 1,055.52 and 484.80

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Solution

The fourth proportional to 764.52, 1,055.52 and 484.80 is: 669.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.52 : 1,055.52 = 484.80 : x
  2. Step 2: Convert to fraction form
    764.52/1,055.52 = 484.80/x
  3. Step 3: Cross multiply
    764.52x = 1,055.52 × 484.80
  4. Step 4: Simplify right side
    764.52x = 511,716.10
  5. Step 5: Solve for x
    x = 511,716.10/764.52
  6. Step 6: Final answer
    x = 669.33

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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.