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Finding the Fourth Proportional to 425,536.40, 638,261.40 and 145,049.60

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Solution

The fourth proportional to 425,536.40, 638,261.40 and 145,049.60 is: 217,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,536.40 : 638,261.40 = 145,049.60 : x
  2. Step 2: Convert to fraction form
    425,536.40/638,261.40 = 145,049.60/x
  3. Step 3: Cross multiply
    425,536.40x = 638,261.40 × 145,049.60
  4. Step 4: Simplify right side
    425,536.40x = 92,579,560,765.44
  5. Step 5: Solve for x
    x = 92,579,560,765.44/425,536.40
  6. Step 6: Final answer
    x = 217,559.67

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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.