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Finding the Fourth Proportional to 290,422,512.80, 406,893,848.80 and 290,422,512.80

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Solution

The fourth proportional to 290,422,512.80, 406,893,848.80 and 290,422,512.80 is: 406,893,848.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,422,512.80 : 406,893,848.80 = 290,422,512.80 : x
  2. Step 2: Convert to fraction form
    290,422,512.80/406,893,848.80 = 290,422,512.80/x
  3. Step 3: Cross multiply
    290,422,512.80x = 406,893,848.80 × 290,422,512.80
  4. Step 4: Simplify right side
    290,422,512.80x = 118,171,134,011,359,280
  5. Step 5: Solve for x
    x = 118,171,134,011,359,280/290,422,512.80
  6. Step 6: Final answer
    x = 406,893,848.80

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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.