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Finding the Fourth Proportional to 411,782.40, 617,673.60 and 145,540.80

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Solution

The fourth proportional to 411,782.40, 617,673.60 and 145,540.80 is: 218,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,782.40 : 617,673.60 = 145,540.80 : x
  2. Step 2: Convert to fraction form
    411,782.40/617,673.60 = 145,540.80/x
  3. Step 3: Cross multiply
    411,782.40x = 617,673.60 × 145,540.80
  4. Step 4: Simplify right side
    411,782.40x = 89,896,709,882.88
  5. Step 5: Solve for x
    x = 89,896,709,882.88/411,782.40
  6. Step 6: Final answer
    x = 218,311.20

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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.