Home / 639,139,804.29-881,962,695.41-391,587,500.61

Finding the Fourth Proportional to 639,139,804.29, 881,962,695.41 and 391,587,500.61

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Solution

The fourth proportional to 639,139,804.29, 881,962,695.41 and 391,587,500.61 is: 540,359,973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,139,804.29 : 881,962,695.41 = 391,587,500.61 : x
  2. Step 2: Convert to fraction form
    639,139,804.29/881,962,695.41 = 391,587,500.61/x
  3. Step 3: Cross multiply
    639,139,804.29x = 881,962,695.41 × 391,587,500.61
  4. Step 4: Simplify right side
    639,139,804.29x = 345,365,567,524,902,656
  5. Step 5: Solve for x
    x = 345,365,567,524,902,656/639,139,804.29
  6. Step 6: Final answer
    x = 540,359,973.21

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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.