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Finding the Fourth Proportional to 290,854.93, 436,282.52 and 91,190.88

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Solution

The fourth proportional to 290,854.93, 436,282.52 and 91,190.88 is: 136,786.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,854.93 : 436,282.52 = 91,190.88 : x
  2. Step 2: Convert to fraction form
    290,854.93/436,282.52 = 91,190.88/x
  3. Step 3: Cross multiply
    290,854.93x = 436,282.52 × 91,190.88
  4. Step 4: Simplify right side
    290,854.93x = 39,784,986,471.46
  5. Step 5: Solve for x
    x = 39,784,986,471.46/290,854.93
  6. Step 6: Final answer
    x = 136,786.36

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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.