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Finding the Fourth Proportional to 397,553, 548,623.14 and 218,705

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Solution

The fourth proportional to 397,553, 548,623.14 and 218,705 is: 301,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,553 : 548,623.14 = 218,705 : x
  2. Step 2: Convert to fraction form
    397,553/548,623.14 = 218,705/x
  3. Step 3: Cross multiply
    397,553x = 548,623.14 × 218,705
  4. Step 4: Simplify right side
    397,553x = 119,986,623,833.70
  5. Step 5: Solve for x
    x = 119,986,623,833.70/397,553
  6. Step 6: Final answer
    x = 301,812.90

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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.