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Finding the Fourth Proportional to 604,638,910.40, 906,958,365.60 and 389,471,115.20

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Solution

The fourth proportional to 604,638,910.40, 906,958,365.60 and 389,471,115.20 is: 584,206,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,638,910.40 : 906,958,365.60 = 389,471,115.20 : x
  2. Step 2: Convert to fraction form
    604,638,910.40/906,958,365.60 = 389,471,115.20/x
  3. Step 3: Cross multiply
    604,638,910.40x = 906,958,365.60 × 389,471,115.20
  4. Step 4: Simplify right side
    604,638,910.40x = 353,234,086,090,201,344
  5. Step 5: Solve for x
    x = 353,234,086,090,201,344/604,638,910.40
  6. Step 6: Final answer
    x = 584,206,672.80

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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.