Home / 2,659,397,128.40-3,989,095,692.60-818,910,657.20

Finding the Fourth Proportional to 2,659,397,128.40, 3,989,095,692.60 and 818,910,657.20

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Solution

The fourth proportional to 2,659,397,128.40, 3,989,095,692.60 and 818,910,657.20 is: 1,228,365,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659,397,128.40 : 3,989,095,692.60 = 818,910,657.20 : x
  2. Step 2: Convert to fraction form
    2,659,397,128.40/3,989,095,692.60 = 818,910,657.20/x
  3. Step 3: Cross multiply
    2,659,397,128.40x = 3,989,095,692.60 × 818,910,657.20
  4. Step 4: Simplify right side
    2,659,397,128.40x = 3,266,712,975,260,755,456
  5. Step 5: Solve for x
    x = 3,266,712,975,260,755,456/2,659,397,128.40
  6. Step 6: Final answer
    x = 1,228,365,985.80

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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.