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Finding the Fourth Proportional to 425,438.40, 638,157.60 and 267,974.40

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Solution

The fourth proportional to 425,438.40, 638,157.60 and 267,974.40 is: 401,961.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,438.40 : 638,157.60 = 267,974.40 : x
  2. Step 2: Convert to fraction form
    425,438.40/638,157.60 = 267,974.40/x
  3. Step 3: Cross multiply
    425,438.40x = 638,157.60 × 267,974.40
  4. Step 4: Simplify right side
    425,438.40x = 171,009,899,965.44
  5. Step 5: Solve for x
    x = 171,009,899,965.44/425,438.40
  6. Step 6: Final answer
    x = 401,961.60

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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.