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Finding the Fourth Proportional to 290,420,934.80, 406,891,639.60 and 290,420,934.80

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Solution

The fourth proportional to 290,420,934.80, 406,891,639.60 and 290,420,934.80 is: 406,891,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,420,934.80 : 406,891,639.60 = 290,420,934.80 : x
  2. Step 2: Convert to fraction form
    290,420,934.80/406,891,639.60 = 290,420,934.80/x
  3. Step 3: Cross multiply
    290,420,934.80x = 406,891,639.60 × 290,420,934.80
  4. Step 4: Simplify right side
    290,420,934.80x = 118,169,850,334,936,704
  5. Step 5: Solve for x
    x = 118,169,850,334,936,704/290,420,934.80
  6. Step 6: Final answer
    x = 406,891,639.60

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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.