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Finding the Fourth Proportional to 395,679.47, 593,602.25 and 129,419.21

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Solution

The fourth proportional to 395,679.47, 593,602.25 and 129,419.21 is: 194,155.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,679.47 : 593,602.25 = 129,419.21 : x
  2. Step 2: Convert to fraction form
    395,679.47/593,602.25 = 129,419.21/x
  3. Step 3: Cross multiply
    395,679.47x = 593,602.25 × 129,419.21
  4. Step 4: Simplify right side
    395,679.47x = 76,823,534,249.22
  5. Step 5: Solve for x
    x = 76,823,534,249.22/395,679.47
  6. Step 6: Final answer
    x = 194,155.98

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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.