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Finding the Fourth Proportional to 518.47, 714.79 and 352.39

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Solution

The fourth proportional to 518.47, 714.79 and 352.39 is: 485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.47 : 714.79 = 352.39 : x
  2. Step 2: Convert to fraction form
    518.47/714.79 = 352.39/x
  3. Step 3: Cross multiply
    518.47x = 714.79 × 352.39
  4. Step 4: Simplify right side
    518.47x = 251,882.86
  5. Step 5: Solve for x
    x = 251,882.86/518.47
  6. Step 6: Final answer
    x = 485.82

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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.