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Finding the Fourth Proportional to 353,421.20, 530,131.80 and 142,950.80

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Solution

The fourth proportional to 353,421.20, 530,131.80 and 142,950.80 is: 214,426.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,421.20 : 530,131.80 = 142,950.80 : x
  2. Step 2: Convert to fraction form
    353,421.20/530,131.80 = 142,950.80/x
  3. Step 3: Cross multiply
    353,421.20x = 530,131.80 × 142,950.80
  4. Step 4: Simplify right side
    353,421.20x = 75,782,764,915.44
  5. Step 5: Solve for x
    x = 75,782,764,915.44/353,421.20
  6. Step 6: Final answer
    x = 214,426.20

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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.