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Finding the Fourth Proportional to 349.93, 486.19 and 345.57

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Solution

The fourth proportional to 349.93, 486.19 and 345.57 is: 480.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.93 : 486.19 = 345.57 : x
  2. Step 2: Convert to fraction form
    349.93/486.19 = 345.57/x
  3. Step 3: Cross multiply
    349.93x = 486.19 × 345.57
  4. Step 4: Simplify right side
    349.93x = 168,012.68
  5. Step 5: Solve for x
    x = 168,012.68/349.93
  6. Step 6: Final answer
    x = 480.13

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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.