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Finding the Fourth Proportional to 321,548.40, 482,495.40 and 134,578.80

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Solution

The fourth proportional to 321,548.40, 482,495.40 and 134,578.80 is: 201,940.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,548.40 : 482,495.40 = 134,578.80 : x
  2. Step 2: Convert to fraction form
    321,548.40/482,495.40 = 134,578.80/x
  3. Step 3: Cross multiply
    321,548.40x = 482,495.40 × 134,578.80
  4. Step 4: Simplify right side
    321,548.40x = 64,933,651,937.52
  5. Step 5: Solve for x
    x = 64,933,651,937.52/321,548.40
  6. Step 6: Final answer
    x = 201,940.52

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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.