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Finding the Fourth Proportional to 2,955.72, 4,433.80 and 764.46

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Solution

The fourth proportional to 2,955.72, 4,433.80 and 764.46 is: 1,146.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,955.72 : 4,433.80 = 764.46 : x
  2. Step 2: Convert to fraction form
    2,955.72/4,433.80 = 764.46/x
  3. Step 3: Cross multiply
    2,955.72x = 4,433.80 × 764.46
  4. Step 4: Simplify right side
    2,955.72x = 3,389,462.75
  5. Step 5: Solve for x
    x = 3,389,462.75/2,955.72
  6. Step 6: Final answer
    x = 1,146.75

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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.