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Finding the Fourth Proportional to 290,835.71, 436,259.03 and 91,151.68

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Solution

The fourth proportional to 290,835.71, 436,259.03 and 91,151.68 is: 136,729.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,835.71 : 436,259.03 = 91,151.68 : x
  2. Step 2: Convert to fraction form
    290,835.71/436,259.03 = 91,151.68/x
  3. Step 3: Cross multiply
    290,835.71x = 436,259.03 × 91,151.68
  4. Step 4: Simplify right side
    290,835.71x = 39,765,743,499.67
  5. Step 5: Solve for x
    x = 39,765,743,499.67/290,835.71
  6. Step 6: Final answer
    x = 136,729.23

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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.