Home / 425,832.12-638,649.77-126,240.46

Finding the Fourth Proportional to 425,832.12, 638,649.77 and 126,240.46

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Solution

The fourth proportional to 425,832.12, 638,649.77 and 126,240.46 is: 189,331.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,832.12 : 638,649.77 = 126,240.46 : x
  2. Step 2: Convert to fraction form
    425,832.12/638,649.77 = 126,240.46/x
  3. Step 3: Cross multiply
    425,832.12x = 638,649.77 × 126,240.46
  4. Step 4: Simplify right side
    425,832.12x = 80,623,438,515.87
  5. Step 5: Solve for x
    x = 80,623,438,515.87/425,832.12
  6. Step 6: Final answer
    x = 189,331.51

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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.