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Finding the Fourth Proportional to 306,090.72, 422,660.04 and 255,369.36

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Solution

The fourth proportional to 306,090.72, 422,660.04 and 255,369.36 is: 352,622.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,090.72 : 422,660.04 = 255,369.36 : x
  2. Step 2: Convert to fraction form
    306,090.72/422,660.04 = 255,369.36/x
  3. Step 3: Cross multiply
    306,090.72x = 422,660.04 × 255,369.36
  4. Step 4: Simplify right side
    306,090.72x = 107,934,423,912.37
  5. Step 5: Solve for x
    x = 107,934,423,912.37/306,090.72
  6. Step 6: Final answer
    x = 352,622.33

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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.