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Finding the Fourth Proportional to 525,703,330.60, 788,554,995.90 and 389,654,434.60

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Solution

The fourth proportional to 525,703,330.60, 788,554,995.90 and 389,654,434.60 is: 584,481,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,703,330.60 : 788,554,995.90 = 389,654,434.60 : x
  2. Step 2: Convert to fraction form
    525,703,330.60/788,554,995.90 = 389,654,434.60/x
  3. Step 3: Cross multiply
    525,703,330.60x = 788,554,995.90 × 389,654,434.60
  4. Step 4: Simplify right side
    525,703,330.60x = 307,263,951,078,419,840
  5. Step 5: Solve for x
    x = 307,263,951,078,419,840/525,703,330.60
  6. Step 6: Final answer
    x = 584,481,651.90

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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.