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Finding the Fourth Proportional to 290,875.82, 436,313.66 and 91,197.22

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Solution

The fourth proportional to 290,875.82, 436,313.66 and 91,197.22 is: 136,795.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,875.82 : 436,313.66 = 91,197.22 : x
  2. Step 2: Convert to fraction form
    290,875.82/436,313.66 = 91,197.22/x
  3. Step 3: Cross multiply
    290,875.82x = 436,313.66 × 91,197.22
  4. Step 4: Simplify right side
    290,875.82x = 39,790,592,840.03
  5. Step 5: Solve for x
    x = 39,790,592,840.03/290,875.82
  6. Step 6: Final answer
    x = 136,795.81

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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.