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Finding the Fourth Proportional to 290,812.88, 436,040.64 and 113,112.74

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Solution

The fourth proportional to 290,812.88, 436,040.64 and 113,112.74 is: 169,599.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,812.88 : 436,040.64 = 113,112.74 : x
  2. Step 2: Convert to fraction form
    290,812.88/436,040.64 = 113,112.74/x
  3. Step 3: Cross multiply
    290,812.88x = 436,040.64 × 113,112.74
  4. Step 4: Simplify right side
    290,812.88x = 49,321,751,541.75
  5. Step 5: Solve for x
    x = 49,321,751,541.75/290,812.88
  6. Step 6: Final answer
    x = 169,599.61

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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.