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Finding the Fourth Proportional to 398,799.78, 550,527.24 and 344,134.50

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Solution

The fourth proportional to 398,799.78, 550,527.24 and 344,134.50 is: 475,063.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,799.78 : 550,527.24 = 344,134.50 : x
  2. Step 2: Convert to fraction form
    398,799.78/550,527.24 = 344,134.50/x
  3. Step 3: Cross multiply
    398,799.78x = 550,527.24 × 344,134.50
  4. Step 4: Simplify right side
    398,799.78x = 189,455,416,473.78
  5. Step 5: Solve for x
    x = 189,455,416,473.78/398,799.78
  6. Step 6: Final answer
    x = 475,063.99

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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.