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Finding the Fourth Proportional to 296,919.60, 445,379.40 and 86,578.80

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Solution

The fourth proportional to 296,919.60, 445,379.40 and 86,578.80 is: 129,868.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,919.60 : 445,379.40 = 86,578.80 : x
  2. Step 2: Convert to fraction form
    296,919.60/445,379.40 = 86,578.80/x
  3. Step 3: Cross multiply
    296,919.60x = 445,379.40 × 86,578.80
  4. Step 4: Simplify right side
    296,919.60x = 38,560,413,996.72
  5. Step 5: Solve for x
    x = 38,560,413,996.72/296,919.60
  6. Step 6: Final answer
    x = 129,868.20

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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.