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Finding the Fourth Proportional to 297,003.60, 445,462.20 and 86,619.60

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Solution

The fourth proportional to 297,003.60, 445,462.20 and 86,619.60 is: 129,916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,003.60 : 445,462.20 = 86,619.60 : x
  2. Step 2: Convert to fraction form
    297,003.60/445,462.20 = 86,619.60/x
  3. Step 3: Cross multiply
    297,003.60x = 445,462.20 × 86,619.60
  4. Step 4: Simplify right side
    297,003.60x = 38,585,757,579.12
  5. Step 5: Solve for x
    x = 38,585,757,579.12/297,003.60
  6. Step 6: Final answer
    x = 129,916.80

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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.