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Finding the Fourth Proportional to 422,115.01, 582,512.93 and 231,128.40

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Solution

The fourth proportional to 422,115.01, 582,512.93 and 231,128.40 is: 318,954.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,115.01 : 582,512.93 = 231,128.40 : x
  2. Step 2: Convert to fraction form
    422,115.01/582,512.93 = 231,128.40/x
  3. Step 3: Cross multiply
    422,115.01x = 582,512.93 × 231,128.40
  4. Step 4: Simplify right side
    422,115.01x = 134,635,281,490.21
  5. Step 5: Solve for x
    x = 134,635,281,490.21/422,115.01
  6. Step 6: Final answer
    x = 318,954.03

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1.5x scale

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.