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Finding the Fourth Proportional to 655,128,515.80, 982,692,773.70 and 605,243,920.60

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Solution

The fourth proportional to 655,128,515.80, 982,692,773.70 and 605,243,920.60 is: 907,865,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,128,515.80 : 982,692,773.70 = 605,243,920.60 : x
  2. Step 2: Convert to fraction form
    655,128,515.80/982,692,773.70 = 605,243,920.60/x
  3. Step 3: Cross multiply
    655,128,515.80x = 982,692,773.70 × 605,243,920.60
  4. Step 4: Simplify right side
    655,128,515.80x = 594,768,827,099,476,608
  5. Step 5: Solve for x
    x = 594,768,827,099,476,608/655,128,515.80
  6. Step 6: Final answer
    x = 907,865,880.90

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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.