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Finding the Fourth Proportional to 395,737.20, 593,605.80 and 143,138.70

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Solution

The fourth proportional to 395,737.20, 593,605.80 and 143,138.70 is: 214,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,737.20 : 593,605.80 = 143,138.70 : x
  2. Step 2: Convert to fraction form
    395,737.20/593,605.80 = 143,138.70/x
  3. Step 3: Cross multiply
    395,737.20x = 593,605.80 × 143,138.70
  4. Step 4: Simplify right side
    395,737.20x = 84,967,962,524.46
  5. Step 5: Solve for x
    x = 84,967,962,524.46/395,737.20
  6. Step 6: Final answer
    x = 214,708.05

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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.