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Finding the Fourth Proportional to 718,755.88, 991,938.81 and 396,494.14

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Solution

The fourth proportional to 718,755.88, 991,938.81 and 396,494.14 is: 547,192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,755.88 : 991,938.81 = 396,494.14 : x
  2. Step 2: Convert to fraction form
    718,755.88/991,938.81 = 396,494.14/x
  3. Step 3: Cross multiply
    718,755.88x = 991,938.81 × 396,494.14
  4. Step 4: Simplify right side
    718,755.88x = 393,297,925,403.57
  5. Step 5: Solve for x
    x = 393,297,925,403.57/718,755.88
  6. Step 6: Final answer
    x = 547,192.64

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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.