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Finding the Fourth Proportional to 425,531.80, 638,297.70 and 126,058.60

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Solution

The fourth proportional to 425,531.80, 638,297.70 and 126,058.60 is: 189,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,531.80 : 638,297.70 = 126,058.60 : x
  2. Step 2: Convert to fraction form
    425,531.80/638,297.70 = 126,058.60/x
  3. Step 3: Cross multiply
    425,531.80x = 638,297.70 × 126,058.60
  4. Step 4: Simplify right side
    425,531.80x = 80,462,914,445.22
  5. Step 5: Solve for x
    x = 80,462,914,445.22/425,531.80
  6. Step 6: Final answer
    x = 189,087.90

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Similar ratio
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1.5x scale

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.