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Finding the Fourth Proportional to 395,129.66, 545,278.95 and 213,842.90

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Solution

The fourth proportional to 395,129.66, 545,278.95 and 213,842.90 is: 295,103.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,129.66 : 545,278.95 = 213,842.90 : x
  2. Step 2: Convert to fraction form
    395,129.66/545,278.95 = 213,842.90/x
  3. Step 3: Cross multiply
    395,129.66x = 545,278.95 × 213,842.90
  4. Step 4: Simplify right side
    395,129.66x = 116,604,029,250.56
  5. Step 5: Solve for x
    x = 116,604,029,250.56/395,129.66
  6. Step 6: Final answer
    x = 295,103.21

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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.