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Finding the Fourth Proportional to 290,442,817.20, 407,640,310.80 and 290,442,817.20

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Solution

The fourth proportional to 290,442,817.20, 407,640,310.80 and 290,442,817.20 is: 407,640,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,442,817.20 : 407,640,310.80 = 290,442,817.20 : x
  2. Step 2: Convert to fraction form
    290,442,817.20/407,640,310.80 = 290,442,817.20/x
  3. Step 3: Cross multiply
    290,442,817.20x = 407,640,310.80 × 290,442,817.20
  4. Step 4: Simplify right side
    290,442,817.20x = 118,396,200,273,035,584
  5. Step 5: Solve for x
    x = 118,396,200,273,035,584/290,442,817.20
  6. Step 6: Final answer
    x = 407,640,310.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.