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Finding the Fourth Proportional to 348.18, 519.83 and 287.43

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Solution

The fourth proportional to 348.18, 519.83 and 287.43 is: 429.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.18 : 519.83 = 287.43 : x
  2. Step 2: Convert to fraction form
    348.18/519.83 = 287.43/x
  3. Step 3: Cross multiply
    348.18x = 519.83 × 287.43
  4. Step 4: Simplify right side
    348.18x = 149,413.30
  5. Step 5: Solve for x
    x = 149,413.30/348.18
  6. Step 6: Final answer
    x = 429.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.