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Finding the Fourth Proportional to 395,518.60, 593,217.15 and 129,280.51

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Solution

The fourth proportional to 395,518.60, 593,217.15 and 129,280.51 is: 193,900.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,518.60 : 593,217.15 = 129,280.51 : x
  2. Step 2: Convert to fraction form
    395,518.60/593,217.15 = 129,280.51/x
  3. Step 3: Cross multiply
    395,518.60x = 593,217.15 × 129,280.51
  4. Step 4: Simplify right side
    395,518.60x = 76,691,415,692.75
  5. Step 5: Solve for x
    x = 76,691,415,692.75/395,518.60
  6. Step 6: Final answer
    x = 193,900.91

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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.