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Finding the Fourth Proportional to 275.70, 379.98 and 210.36

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Solution

The fourth proportional to 275.70, 379.98 and 210.36 is: 289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.70 : 379.98 = 210.36 : x
  2. Step 2: Convert to fraction form
    275.70/379.98 = 210.36/x
  3. Step 3: Cross multiply
    275.70x = 379.98 × 210.36
  4. Step 4: Simplify right side
    275.70x = 79,932.59
  5. Step 5: Solve for x
    x = 79,932.59/275.70
  6. Step 6: Final answer
    x = 289.93

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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.