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Finding the Fourth Proportional to 518.78, 716.07 and 332.38

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Solution

The fourth proportional to 518.78, 716.07 and 332.38 is: 458.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.78 : 716.07 = 332.38 : x
  2. Step 2: Convert to fraction form
    518.78/716.07 = 332.38/x
  3. Step 3: Cross multiply
    518.78x = 716.07 × 332.38
  4. Step 4: Simplify right side
    518.78x = 238,007.35
  5. Step 5: Solve for x
    x = 238,007.35/518.78
  6. Step 6: Final answer
    x = 458.78

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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.