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Finding the Fourth Proportional to 386,679.75, 579,881.23 and 133,892.39

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Solution

The fourth proportional to 386,679.75, 579,881.23 and 133,892.39 is: 200,790.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,679.75 : 579,881.23 = 133,892.39 : x
  2. Step 2: Convert to fraction form
    386,679.75/579,881.23 = 133,892.39/x
  3. Step 3: Cross multiply
    386,679.75x = 579,881.23 × 133,892.39
  4. Step 4: Simplify right side
    386,679.75x = 77,641,684,915.81
  5. Step 5: Solve for x
    x = 77,641,684,915.81/386,679.75
  6. Step 6: Final answer
    x = 200,790.67

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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.