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Finding the Fourth Proportional to 636,814.45, 878,781.76 and 350,331.49

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Solution

The fourth proportional to 636,814.45, 878,781.76 and 350,331.49 is: 483,445.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,814.45 : 878,781.76 = 350,331.49 : x
  2. Step 2: Convert to fraction form
    636,814.45/878,781.76 = 350,331.49/x
  3. Step 3: Cross multiply
    636,814.45x = 878,781.76 × 350,331.49
  4. Step 4: Simplify right side
    636,814.45x = 307,864,923,365.62
  5. Step 5: Solve for x
    x = 307,864,923,365.62/636,814.45
  6. Step 6: Final answer
    x = 483,445.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.