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Finding the Fourth Proportional to 395,008.89, 545,108.39 and 213,716.84

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Solution

The fourth proportional to 395,008.89, 545,108.39 and 213,716.84 is: 294,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,008.89 : 545,108.39 = 213,716.84 : x
  2. Step 2: Convert to fraction form
    395,008.89/545,108.39 = 213,716.84/x
  3. Step 3: Cross multiply
    395,008.89x = 545,108.39 × 213,716.84
  4. Step 4: Simplify right side
    395,008.89x = 116,498,841,619.76
  5. Step 5: Solve for x
    x = 116,498,841,619.76/395,008.89
  6. Step 6: Final answer
    x = 294,927.14

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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.