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Finding the Fourth Proportional to 639,231,608.40, 958,847,412.60 and 432,607,347.60

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Solution

The fourth proportional to 639,231,608.40, 958,847,412.60 and 432,607,347.60 is: 648,911,021.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,231,608.40 : 958,847,412.60 = 432,607,347.60 : x
  2. Step 2: Convert to fraction form
    639,231,608.40/958,847,412.60 = 432,607,347.60/x
  3. Step 3: Cross multiply
    639,231,608.40x = 958,847,412.60 × 432,607,347.60
  4. Step 4: Simplify right side
    639,231,608.40x = 414,804,435,918,008,832
  5. Step 5: Solve for x
    x = 414,804,435,918,008,832/639,231,608.40
  6. Step 6: Final answer
    x = 648,911,021.40

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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.