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Finding the Fourth Proportional to 395,149.04, 545,306.34 and 213,861.12

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Solution

The fourth proportional to 395,149.04, 545,306.34 and 213,861.12 is: 295,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,149.04 : 545,306.34 = 213,861.12 : x
  2. Step 2: Convert to fraction form
    395,149.04/545,306.34 = 213,861.12/x
  3. Step 3: Cross multiply
    395,149.04x = 545,306.34 × 213,861.12
  4. Step 4: Simplify right side
    395,149.04x = 116,619,824,615.50
  5. Step 5: Solve for x
    x = 116,619,824,615.50/395,149.04
  6. Step 6: Final answer
    x = 295,128.71

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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.