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Finding the Fourth Proportional to 719,295,493.88, 992,627,772.26 and 389,270,632.88

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Solution

The fourth proportional to 719,295,493.88, 992,627,772.26 and 389,270,632.88 is: 537,193,468.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,295,493.88 : 992,627,772.26 = 389,270,632.88 : x
  2. Step 2: Convert to fraction form
    719,295,493.88/992,627,772.26 = 389,270,632.88/x
  3. Step 3: Cross multiply
    719,295,493.88x = 992,627,772.26 × 389,270,632.88
  4. Step 4: Simplify right side
    719,295,493.88x = 386,400,841,122,449,920
  5. Step 5: Solve for x
    x = 386,400,841,122,449,920/719,295,493.88
  6. Step 6: Final answer
    x = 537,193,468.34

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1.5x scale

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.