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Finding the Fourth Proportional to 290,928.38, 436,388.18 and 130,891.30

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Solution

The fourth proportional to 290,928.38, 436,388.18 and 130,891.30 is: 196,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,928.38 : 436,388.18 = 130,891.30 : x
  2. Step 2: Convert to fraction form
    290,928.38/436,388.18 = 130,891.30/x
  3. Step 3: Cross multiply
    290,928.38x = 436,388.18 × 130,891.30
  4. Step 4: Simplify right side
    290,928.38x = 57,119,416,184.83
  5. Step 5: Solve for x
    x = 57,119,416,184.83/290,928.38
  6. Step 6: Final answer
    x = 196,334.97

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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.