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Finding the Fourth Proportional to 290,995,220.80, 436,660,792.80 and 109,260,769.60

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Solution

The fourth proportional to 290,995,220.80, 436,660,792.80 and 109,260,769.60 is: 163,954,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,995,220.80 : 436,660,792.80 = 109,260,769.60 : x
  2. Step 2: Convert to fraction form
    290,995,220.80/436,660,792.80 = 109,260,769.60/x
  3. Step 3: Cross multiply
    290,995,220.80x = 436,660,792.80 × 109,260,769.60
  4. Step 4: Simplify right side
    290,995,220.80x = 47,709,894,275,474,136
  5. Step 5: Solve for x
    x = 47,709,894,275,474,136/290,995,220.80
  6. Step 6: Final answer
    x = 163,954,219.40

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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.