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Finding the Fourth Proportional to 847.94, 1,170.38 and 516.55

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Solution

The fourth proportional to 847.94, 1,170.38 and 516.55 is: 712.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.94 : 1,170.38 = 516.55 : x
  2. Step 2: Convert to fraction form
    847.94/1,170.38 = 516.55/x
  3. Step 3: Cross multiply
    847.94x = 1,170.38 × 516.55
  4. Step 4: Simplify right side
    847.94x = 604,559.79
  5. Step 5: Solve for x
    x = 604,559.79/847.94
  6. Step 6: Final answer
    x = 712.97

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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.