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Finding the Fourth Proportional to 525,703,408.60, 788,555,112.90 and 389,654,512.60

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Solution

The fourth proportional to 525,703,408.60, 788,555,112.90 and 389,654,512.60 is: 584,481,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,703,408.60 : 788,555,112.90 = 389,654,512.60 : x
  2. Step 2: Convert to fraction form
    525,703,408.60/788,555,112.90 = 389,654,512.60/x
  3. Step 3: Cross multiply
    525,703,408.60x = 788,555,112.90 × 389,654,512.60
  4. Step 4: Simplify right side
    525,703,408.60x = 307,264,058,175,287,488
  5. Step 5: Solve for x
    x = 307,264,058,175,287,488/525,703,408.60
  6. Step 6: Final answer
    x = 584,481,768.90

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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.