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Finding the Fourth Proportional to 640,978,204.20, 961,467,306.30 and 634,175,759.40

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Solution

The fourth proportional to 640,978,204.20, 961,467,306.30 and 634,175,759.40 is: 951,263,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,978,204.20 : 961,467,306.30 = 634,175,759.40 : x
  2. Step 2: Convert to fraction form
    640,978,204.20/961,467,306.30 = 634,175,759.40/x
  3. Step 3: Cross multiply
    640,978,204.20x = 961,467,306.30 × 634,175,759.40
  4. Step 4: Simplify right side
    640,978,204.20x = 609,739,259,111,074,816
  5. Step 5: Solve for x
    x = 609,739,259,111,074,816/640,978,204.20
  6. Step 6: Final answer
    x = 951,263,639.10

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1.5x scale

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.