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Finding the Fourth Proportional to 290,674.92, 436,020.58 and 80,312.88

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Solution

The fourth proportional to 290,674.92, 436,020.58 and 80,312.88 is: 120,471.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,674.92 : 436,020.58 = 80,312.88 : x
  2. Step 2: Convert to fraction form
    290,674.92/436,020.58 = 80,312.88/x
  3. Step 3: Cross multiply
    290,674.92x = 436,020.58 × 80,312.88
  4. Step 4: Simplify right side
    290,674.92x = 35,018,068,519.07
  5. Step 5: Solve for x
    x = 35,018,068,519.07/290,674.92
  6. Step 6: Final answer
    x = 120,471.59

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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.