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Finding the Fourth Proportional to 290,989.49, 436,502.67 and 91,317.75

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Solution

The fourth proportional to 290,989.49, 436,502.67 and 91,317.75 is: 136,982.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,989.49 : 436,502.67 = 91,317.75 : x
  2. Step 2: Convert to fraction form
    290,989.49/436,502.67 = 91,317.75/x
  3. Step 3: Cross multiply
    290,989.49x = 436,502.67 × 91,317.75
  4. Step 4: Simplify right side
    290,989.49x = 39,860,441,693.39
  5. Step 5: Solve for x
    x = 39,860,441,693.39/290,989.49
  6. Step 6: Final answer
    x = 136,982.41

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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.