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Finding the Fourth Proportional to 525,703,332.60, 788,554,998.90 and 389,654,436.60

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Solution

The fourth proportional to 525,703,332.60, 788,554,998.90 and 389,654,436.60 is: 584,481,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,703,332.60 : 788,554,998.90 = 389,654,436.60 : x
  2. Step 2: Convert to fraction form
    525,703,332.60/788,554,998.90 = 389,654,436.60/x
  3. Step 3: Cross multiply
    525,703,332.60x = 788,554,998.90 × 389,654,436.60
  4. Step 4: Simplify right side
    525,703,332.60x = 307,263,953,824,493,120
  5. Step 5: Solve for x
    x = 307,263,953,824,493,120/525,703,332.60
  6. Step 6: Final answer
    x = 584,481,654.90

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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.