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Finding the Fourth Proportional to 290,821.67, 436,232.54 and 91,142.03

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Solution

The fourth proportional to 290,821.67, 436,232.54 and 91,142.03 is: 136,713.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,821.67 : 436,232.54 = 91,142.03 : x
  2. Step 2: Convert to fraction form
    290,821.67/436,232.54 = 91,142.03/x
  3. Step 3: Cross multiply
    290,821.67x = 436,232.54 × 91,142.03
  4. Step 4: Simplify right side
    290,821.67x = 39,759,118,791.95
  5. Step 5: Solve for x
    x = 39,759,118,791.95/290,821.67
  6. Step 6: Final answer
    x = 136,713.05

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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.