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Finding the Fourth Proportional to 290,881.73, 436,322.63 and 91,219.57

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Solution

The fourth proportional to 290,881.73, 436,322.63 and 91,219.57 is: 136,829.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,881.73 : 436,322.63 = 91,219.57 : x
  2. Step 2: Convert to fraction form
    290,881.73/436,322.63 = 91,219.57/x
  3. Step 3: Cross multiply
    290,881.73x = 436,322.63 × 91,219.57
  4. Step 4: Simplify right side
    290,881.73x = 39,801,161,827.11
  5. Step 5: Solve for x
    x = 39,801,161,827.11/290,881.73
  6. Step 6: Final answer
    x = 136,829.36

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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.