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Finding the Fourth Proportional to 395,189.21, 592,781.39 and 128,949.91

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Solution

The fourth proportional to 395,189.21, 592,781.39 and 128,949.91 is: 193,424.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,189.21 : 592,781.39 = 128,949.91 : x
  2. Step 2: Convert to fraction form
    395,189.21/592,781.39 = 128,949.91/x
  3. Step 3: Cross multiply
    395,189.21x = 592,781.39 × 128,949.91
  4. Step 4: Simplify right side
    395,189.21x = 76,439,105,247.03
  5. Step 5: Solve for x
    x = 76,439,105,247.03/395,189.21
  6. Step 6: Final answer
    x = 193,424.07

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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.