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Finding the Fourth Proportional to 767.44, 1,059.64 and 679.02

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Solution

The fourth proportional to 767.44, 1,059.64 and 679.02 is: 937.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.44 : 1,059.64 = 679.02 : x
  2. Step 2: Convert to fraction form
    767.44/1,059.64 = 679.02/x
  3. Step 3: Cross multiply
    767.44x = 1,059.64 × 679.02
  4. Step 4: Simplify right side
    767.44x = 719,516.75
  5. Step 5: Solve for x
    x = 719,516.75/767.44
  6. Step 6: Final answer
    x = 937.55

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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.