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Finding the Fourth Proportional to 353,610.20, 530,415.30 and 143,139.80

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Solution

The fourth proportional to 353,610.20, 530,415.30 and 143,139.80 is: 214,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,610.20 : 530,415.30 = 143,139.80 : x
  2. Step 2: Convert to fraction form
    353,610.20/530,415.30 = 143,139.80/x
  3. Step 3: Cross multiply
    353,610.20x = 530,415.30 × 143,139.80
  4. Step 4: Simplify right side
    353,610.20x = 75,923,539,958.94
  5. Step 5: Solve for x
    x = 75,923,539,958.94/353,610.20
  6. Step 6: Final answer
    x = 214,709.70

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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.