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Finding the Fourth Proportional to 297,265.80, 445,625.70 and 128,679.96

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Solution

The fourth proportional to 297,265.80, 445,625.70 and 128,679.96 is: 192,901.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,265.80 : 445,625.70 = 128,679.96 : x
  2. Step 2: Convert to fraction form
    297,265.80/445,625.70 = 128,679.96/x
  3. Step 3: Cross multiply
    297,265.80x = 445,625.70 × 128,679.96
  4. Step 4: Simplify right side
    297,265.80x = 57,343,097,250.97
  5. Step 5: Solve for x
    x = 57,343,097,250.97/297,265.80
  6. Step 6: Final answer
    x = 192,901.76

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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.