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Finding the Fourth Proportional to 395,292.67, 545,500.09 and 213,999.95

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Solution

The fourth proportional to 395,292.67, 545,500.09 and 213,999.95 is: 295,317.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,292.67 : 545,500.09 = 213,999.95 : x
  2. Step 2: Convert to fraction form
    395,292.67/545,500.09 = 213,999.95/x
  3. Step 3: Cross multiply
    395,292.67x = 545,500.09 × 213,999.95
  4. Step 4: Simplify right side
    395,292.67x = 116,736,991,985.00
  5. Step 5: Solve for x
    x = 116,736,991,985.00/395,292.67
  6. Step 6: Final answer
    x = 295,317.88

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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.