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Finding the Fourth Proportional to 517.19, 713.21 and 438.41

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Solution

The fourth proportional to 517.19, 713.21 and 438.41 is: 604.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.19 : 713.21 = 438.41 : x
  2. Step 2: Convert to fraction form
    517.19/713.21 = 438.41/x
  3. Step 3: Cross multiply
    517.19x = 713.21 × 438.41
  4. Step 4: Simplify right side
    517.19x = 312,677.99
  5. Step 5: Solve for x
    x = 312,677.99/517.19
  6. Step 6: Final answer
    x = 604.58

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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.