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Finding the Fourth Proportional to 543,642.64, 815,104.01 and 259,377.05

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Solution

The fourth proportional to 543,642.64, 815,104.01 and 259,377.05 is: 388,893.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,642.64 : 815,104.01 = 259,377.05 : x
  2. Step 2: Convert to fraction form
    543,642.64/815,104.01 = 259,377.05/x
  3. Step 3: Cross multiply
    543,642.64x = 815,104.01 × 259,377.05
  4. Step 4: Simplify right side
    543,642.64x = 211,419,276,243.17
  5. Step 5: Solve for x
    x = 211,419,276,243.17/543,642.64
  6. Step 6: Final answer
    x = 388,893.85

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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.