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Finding the Fourth Proportional to 290,783.31, 436,174.47 and 91,119.03

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Solution

The fourth proportional to 290,783.31, 436,174.47 and 91,119.03 is: 136,678.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,783.31 : 436,174.47 = 91,119.03 : x
  2. Step 2: Convert to fraction form
    290,783.31/436,174.47 = 91,119.03/x
  3. Step 3: Cross multiply
    290,783.31x = 436,174.47 × 91,119.03
  4. Step 4: Simplify right side
    290,783.31x = 39,743,794,617.16
  5. Step 5: Solve for x
    x = 39,743,794,617.16/290,783.31
  6. Step 6: Final answer
    x = 136,678.39

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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.