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Finding the Fourth Proportional to 290,843.32, 436,270.52 and 91,159.32

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Solution

The fourth proportional to 290,843.32, 436,270.52 and 91,159.32 is: 136,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,843.32 : 436,270.52 = 91,159.32 : x
  2. Step 2: Convert to fraction form
    290,843.32/436,270.52 = 91,159.32/x
  3. Step 3: Cross multiply
    290,843.32x = 436,270.52 × 91,159.32
  4. Step 4: Simplify right side
    290,843.32x = 39,770,123,939.25
  5. Step 5: Solve for x
    x = 39,770,123,939.25/290,843.32
  6. Step 6: Final answer
    x = 136,740.72

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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.