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Finding the Fourth Proportional to 321,860.40, 482,963.40 and 134,890.80

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Solution

The fourth proportional to 321,860.40, 482,963.40 and 134,890.80 is: 202,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,860.40 : 482,963.40 = 134,890.80 : x
  2. Step 2: Convert to fraction form
    321,860.40/482,963.40 = 134,890.80/x
  3. Step 3: Cross multiply
    321,860.40x = 482,963.40 × 134,890.80
  4. Step 4: Simplify right side
    321,860.40x = 65,147,319,396.72
  5. Step 5: Solve for x
    x = 65,147,319,396.72/321,860.40
  6. Step 6: Final answer
    x = 202,408.62

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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.