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Finding the Fourth Proportional to 386,073.90, 579,188.31 and 133,363.62

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Solution

The fourth proportional to 386,073.90, 579,188.31 and 133,363.62 is: 200,072.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,073.90 : 579,188.31 = 133,363.62 : x
  2. Step 2: Convert to fraction form
    386,073.90/579,188.31 = 133,363.62/x
  3. Step 3: Cross multiply
    386,073.90x = 579,188.31 × 133,363.62
  4. Step 4: Simplify right side
    386,073.90x = 77,242,649,683.28
  5. Step 5: Solve for x
    x = 77,242,649,683.28/386,073.90
  6. Step 6: Final answer
    x = 200,072.19

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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.