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Finding the Fourth Proportional to 395,093.78, 545,229.40 and 213,805.70

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Solution

The fourth proportional to 395,093.78, 545,229.40 and 213,805.70 is: 295,051.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,093.78 : 545,229.40 = 213,805.70 : x
  2. Step 2: Convert to fraction form
    395,093.78/545,229.40 = 213,805.70/x
  3. Step 3: Cross multiply
    395,093.78x = 545,229.40 × 213,805.70
  4. Step 4: Simplify right side
    395,093.78x = 116,573,153,527.58
  5. Step 5: Solve for x
    x = 116,573,153,527.58/395,093.78
  6. Step 6: Final answer
    x = 295,051.86

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1.5x scale

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.