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Finding the Fourth Proportional to 395,655.60, 593,483.40 and 129,351.90

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Solution

The fourth proportional to 395,655.60, 593,483.40 and 129,351.90 is: 194,027.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,655.60 : 593,483.40 = 129,351.90 : x
  2. Step 2: Convert to fraction form
    395,655.60/593,483.40 = 129,351.90/x
  3. Step 3: Cross multiply
    395,655.60x = 593,483.40 × 129,351.90
  4. Step 4: Simplify right side
    395,655.60x = 76,768,205,408.46
  5. Step 5: Solve for x
    x = 76,768,205,408.46/395,655.60
  6. Step 6: Final answer
    x = 194,027.85

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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.