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Finding the Fourth Proportional to 543,615.45, 815,063.25 and 259,349.87

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Solution

The fourth proportional to 543,615.45, 815,063.25 and 259,349.87 is: 388,853.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,615.45 : 815,063.25 = 259,349.87 : x
  2. Step 2: Convert to fraction form
    543,615.45/815,063.25 = 259,349.87/x
  3. Step 3: Cross multiply
    543,615.45x = 815,063.25 × 259,349.87
  4. Step 4: Simplify right side
    543,615.45x = 211,386,543,853.96
  5. Step 5: Solve for x
    x = 211,386,543,853.96/543,615.45
  6. Step 6: Final answer
    x = 388,853.09

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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.