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Finding the Fourth Proportional to 290,990.70, 436,492.92 and 80,630.46

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Solution

The fourth proportional to 290,990.70, 436,492.92 and 80,630.46 is: 120,947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,990.70 : 436,492.92 = 80,630.46 : x
  2. Step 2: Convert to fraction form
    290,990.70/436,492.92 = 80,630.46/x
  3. Step 3: Cross multiply
    290,990.70x = 436,492.92 × 80,630.46
  4. Step 4: Simplify right side
    290,990.70x = 35,194,624,926.34
  5. Step 5: Solve for x
    x = 35,194,624,926.34/290,990.70
  6. Step 6: Final answer
    x = 120,947.59

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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.