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Finding the Fourth Proportional to 543,435.76, 815,315.64 and 259,339.60

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Solution

The fourth proportional to 543,435.76, 815,315.64 and 259,339.60 is: 389,086.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,435.76 : 815,315.64 = 259,339.60 : x
  2. Step 2: Convert to fraction form
    543,435.76/815,315.64 = 259,339.60/x
  3. Step 3: Cross multiply
    543,435.76x = 815,315.64 × 259,339.60
  4. Step 4: Simplify right side
    543,435.76x = 211,443,631,951.34
  5. Step 5: Solve for x
    x = 211,443,631,951.34/543,435.76
  6. Step 6: Final answer
    x = 389,086.71

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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.