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Finding the Fourth Proportional to 478,615.71, 660,489.68 and 263,755.78

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Solution

The fourth proportional to 478,615.71, 660,489.68 and 263,755.78 is: 363,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,615.71 : 660,489.68 = 263,755.78 : x
  2. Step 2: Convert to fraction form
    478,615.71/660,489.68 = 263,755.78/x
  3. Step 3: Cross multiply
    478,615.71x = 660,489.68 × 263,755.78
  4. Step 4: Simplify right side
    478,615.71x = 174,207,967,974.39
  5. Step 5: Solve for x
    x = 174,207,967,974.39/478,615.71
  6. Step 6: Final answer
    x = 363,982.97

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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.