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Finding the Fourth Proportional to 691,394,359.21, 954,066,537.07 and 389,963,059.90

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Solution

The fourth proportional to 691,394,359.21, 954,066,537.07 and 389,963,059.90 is: 538,116,490.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,394,359.21 : 954,066,537.07 = 389,963,059.90 : x
  2. Step 2: Convert to fraction form
    691,394,359.21/954,066,537.07 = 389,963,059.90/x
  3. Step 3: Cross multiply
    691,394,359.21x = 954,066,537.07 × 389,963,059.90
  4. Step 4: Simplify right side
    691,394,359.21x = 372,050,706,144,013,952
  5. Step 5: Solve for x
    x = 372,050,706,144,013,952/691,394,359.21
  6. Step 6: Final answer
    x = 538,116,490.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.