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Finding the Fourth Proportional to 375.80, 518.62 and 210.00

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Solution

The fourth proportional to 375.80, 518.62 and 210.00 is: 289.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.80 : 518.62 = 210.00 : x
  2. Step 2: Convert to fraction form
    375.80/518.62 = 210.00/x
  3. Step 3: Cross multiply
    375.80x = 518.62 × 210.00
  4. Step 4: Simplify right side
    375.80x = 108,910.97
  5. Step 5: Solve for x
    x = 108,910.97/375.80
  6. Step 6: Final answer
    x = 289.81

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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.