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Finding the Fourth Proportional to 357.69, 495.70 and 351.21

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Solution

The fourth proportional to 357.69, 495.70 and 351.21 is: 486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.69 : 495.70 = 351.21 : x
  2. Step 2: Convert to fraction form
    357.69/495.70 = 351.21/x
  3. Step 3: Cross multiply
    357.69x = 495.70 × 351.21
  4. Step 4: Simplify right side
    357.69x = 174,093.92
  5. Step 5: Solve for x
    x = 174,093.92/357.69
  6. Step 6: Final answer
    x = 486.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.