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Finding the Fourth Proportional to 217,486.40, 325,711.20 and 133,505.60

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Solution

The fourth proportional to 217,486.40, 325,711.20 and 133,505.60 is: 199,940.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,486.40 : 325,711.20 = 133,505.60 : x
  2. Step 2: Convert to fraction form
    217,486.40/325,711.20 = 133,505.60/x
  3. Step 3: Cross multiply
    217,486.40x = 325,711.20 × 133,505.60
  4. Step 4: Simplify right side
    217,486.40x = 43,484,269,182.72
  5. Step 5: Solve for x
    x = 43,484,269,182.72/217,486.40
  6. Step 6: Final answer
    x = 199,940.18

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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.