Home / 491,180,542.47-678,135,109.48-312,665,192.61

Finding the Fourth Proportional to 491,180,542.47, 678,135,109.48 and 312,665,192.61

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Solution

The fourth proportional to 491,180,542.47, 678,135,109.48 and 312,665,192.61 is: 431,672,727.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,180,542.47 : 678,135,109.48 = 312,665,192.61 : x
  2. Step 2: Convert to fraction form
    491,180,542.47/678,135,109.48 = 312,665,192.61/x
  3. Step 3: Cross multiply
    491,180,542.47x = 678,135,109.48 × 312,665,192.61
  4. Step 4: Simplify right side
    491,180,542.47x = 212,029,244,623,411,232
  5. Step 5: Solve for x
    x = 212,029,244,623,411,232/491,180,542.47
  6. Step 6: Final answer
    x = 431,672,727.83

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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.