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Finding the Fourth Proportional to 395,605.91, 593,502.21 and 129,365.39

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Solution

The fourth proportional to 395,605.91, 593,502.21 and 129,365.39 is: 194,078.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,605.91 : 593,502.21 = 129,365.39 : x
  2. Step 2: Convert to fraction form
    395,605.91/593,502.21 = 129,365.39/x
  3. Step 3: Cross multiply
    395,605.91x = 593,502.21 × 129,365.39
  4. Step 4: Simplify right side
    395,605.91x = 76,778,644,862.51
  5. Step 5: Solve for x
    x = 76,778,644,862.51/395,605.91
  6. Step 6: Final answer
    x = 194,078.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.