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Finding the Fourth Proportional to 517.41, 713.88 and 386.46

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Solution

The fourth proportional to 517.41, 713.88 and 386.46 is: 533.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.41 : 713.88 = 386.46 : x
  2. Step 2: Convert to fraction form
    517.41/713.88 = 386.46/x
  3. Step 3: Cross multiply
    517.41x = 713.88 × 386.46
  4. Step 4: Simplify right side
    517.41x = 275,886.06
  5. Step 5: Solve for x
    x = 275,886.06/517.41
  6. Step 6: Final answer
    x = 533.21

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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.