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Finding the Fourth Proportional to 395,739.20, 593,608.80 and 143,140.70

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Solution

The fourth proportional to 395,739.20, 593,608.80 and 143,140.70 is: 214,711.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,739.20 : 593,608.80 = 143,140.70 : x
  2. Step 2: Convert to fraction form
    395,739.20/593,608.80 = 143,140.70/x
  3. Step 3: Cross multiply
    395,739.20x = 593,608.80 × 143,140.70
  4. Step 4: Simplify right side
    395,739.20x = 84,969,579,158.16
  5. Step 5: Solve for x
    x = 84,969,579,158.16/395,739.20
  6. Step 6: Final answer
    x = 214,711.05

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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.