Home / 290,842.32-436,269-91,158.30

Finding the Fourth Proportional to 290,842.32, 436,269 and 91,158.30

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Solution

The fourth proportional to 290,842.32, 436,269 and 91,158.30 is: 136,739.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,842.32 : 436,269 = 91,158.30 : x
  2. Step 2: Convert to fraction form
    290,842.32/436,269 = 91,158.30/x
  3. Step 3: Cross multiply
    290,842.32x = 436,269 × 91,158.30
  4. Step 4: Simplify right side
    290,842.32x = 39,769,540,382.70
  5. Step 5: Solve for x
    x = 39,769,540,382.70/290,842.32
  6. Step 6: Final answer
    x = 136,739.18

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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.