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Finding the Fourth Proportional to 655,128,720.80, 982,693,081.20 and 605,244,125.60

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Solution

The fourth proportional to 655,128,720.80, 982,693,081.20 and 605,244,125.60 is: 907,866,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,128,720.80 : 982,693,081.20 = 605,244,125.60 : x
  2. Step 2: Convert to fraction form
    655,128,720.80/982,693,081.20 = 605,244,125.60/x
  3. Step 3: Cross multiply
    655,128,720.80x = 982,693,081.20 × 605,244,125.60
  4. Step 4: Simplify right side
    655,128,720.80x = 594,769,214,664,063,872
  5. Step 5: Solve for x
    x = 594,769,214,664,063,872/655,128,720.80
  6. Step 6: Final answer
    x = 907,866,188.40

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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.