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Finding the Fourth Proportional to 274,422.40, 411,633.60 and 97,129.60

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Solution

The fourth proportional to 274,422.40, 411,633.60 and 97,129.60 is: 145,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,422.40 : 411,633.60 = 97,129.60 : x
  2. Step 2: Convert to fraction form
    274,422.40/411,633.60 = 97,129.60/x
  3. Step 3: Cross multiply
    274,422.40x = 411,633.60 × 97,129.60
  4. Step 4: Simplify right side
    274,422.40x = 39,981,806,914.56
  5. Step 5: Solve for x
    x = 39,981,806,914.56/274,422.40
  6. Step 6: Final answer
    x = 145,694.40

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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.