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Finding the Fourth Proportional to 664,354.80, 996,629.40 and 214,999.20

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Solution

The fourth proportional to 664,354.80, 996,629.40 and 214,999.20 is: 322,530.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,354.80 : 996,629.40 = 214,999.20 : x
  2. Step 2: Convert to fraction form
    664,354.80/996,629.40 = 214,999.20/x
  3. Step 3: Cross multiply
    664,354.80x = 996,629.40 × 214,999.20
  4. Step 4: Simplify right side
    664,354.80x = 214,274,523,696.48
  5. Step 5: Solve for x
    x = 214,274,523,696.48/664,354.80
  6. Step 6: Final answer
    x = 322,530.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.