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Finding the Fourth Proportional to 609.48, 840.66 and 516.84

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Solution

The fourth proportional to 609.48, 840.66 and 516.84 is: 712.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.48 : 840.66 = 516.84 : x
  2. Step 2: Convert to fraction form
    609.48/840.66 = 516.84/x
  3. Step 3: Cross multiply
    609.48x = 840.66 × 516.84
  4. Step 4: Simplify right side
    609.48x = 434,486.71
  5. Step 5: Solve for x
    x = 434,486.71/609.48
  6. Step 6: Final answer
    x = 712.88

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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.