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Finding the Fourth Proportional to 312,788.40, 469,110.62 and 186,464.30

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Solution

The fourth proportional to 312,788.40, 469,110.62 and 186,464.30 is: 279,653.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,788.40 : 469,110.62 = 186,464.30 : x
  2. Step 2: Convert to fraction form
    312,788.40/469,110.62 = 186,464.30/x
  3. Step 3: Cross multiply
    312,788.40x = 469,110.62 × 186,464.30
  4. Step 4: Simplify right side
    312,788.40x = 87,472,383,380.87
  5. Step 5: Solve for x
    x = 87,472,383,380.87/312,788.40
  6. Step 6: Final answer
    x = 279,653.54

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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.