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Finding the Fourth Proportional to 397,696.50, 548,821.26 and 218,848.50

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Solution

The fourth proportional to 397,696.50, 548,821.26 and 218,848.50 is: 302,010.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,696.50 : 548,821.26 = 218,848.50 : x
  2. Step 2: Convert to fraction form
    397,696.50/548,821.26 = 218,848.50/x
  3. Step 3: Cross multiply
    397,696.50x = 548,821.26 × 218,848.50
  4. Step 4: Simplify right side
    397,696.50x = 120,108,709,519.11
  5. Step 5: Solve for x
    x = 120,108,709,519.11/397,696.50
  6. Step 6: Final answer
    x = 302,010.98

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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.