Home / 811,521,591.56-1,218,069,542.31-391,638,452.90

Finding the Fourth Proportional to 811,521,591.56, 1,218,069,542.31 and 391,638,452.90

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Solution

The fourth proportional to 811,521,591.56, 1,218,069,542.31 and 391,638,452.90 is: 587,837,558.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,521,591.56 : 1,218,069,542.31 = 391,638,452.90 : x
  2. Step 2: Convert to fraction form
    811,521,591.56/1,218,069,542.31 = 391,638,452.90/x
  3. Step 3: Cross multiply
    811,521,591.56x = 1,218,069,542.31 × 391,638,452.90
  4. Step 4: Simplify right side
    811,521,591.56x = 477,042,871,074,899,456
  5. Step 5: Solve for x
    x = 477,042,871,074,899,456/811,521,591.56
  6. Step 6: Final answer
    x = 587,837,558.53

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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.