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Finding the Fourth Proportional to 493,755.31, 681,437.75 and 278,909.21

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Solution

The fourth proportional to 493,755.31, 681,437.75 and 278,909.21 is: 384,926.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,755.31 : 681,437.75 = 278,909.21 : x
  2. Step 2: Convert to fraction form
    493,755.31/681,437.75 = 278,909.21/x
  3. Step 3: Cross multiply
    493,755.31x = 681,437.75 × 278,909.21
  4. Step 4: Simplify right side
    493,755.31x = 190,059,264,825.73
  5. Step 5: Solve for x
    x = 190,059,264,825.73/493,755.31
  6. Step 6: Final answer
    x = 384,926.02

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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.