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Finding the Fourth Proportional to 698,992,388, 964,609,910.16 and 389,943,044

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Solution

The fourth proportional to 698,992,388, 964,609,910.16 and 389,943,044 is: 538,121,632.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,992,388 : 964,609,910.16 = 389,943,044 : x
  2. Step 2: Convert to fraction form
    698,992,388/964,609,910.16 = 389,943,044/x
  3. Step 3: Cross multiply
    698,992,388x = 964,609,910.16 × 389,943,044
  4. Step 4: Simplify right side
    698,992,388x = 376,142,924,640,356,928
  5. Step 5: Solve for x
    x = 376,142,924,640,356,928/698,992,388
  6. Step 6: Final answer
    x = 538,121,632.08

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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.