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Finding the Fourth Proportional to 427,215.96, 640,765.44 and 111,695.04

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Solution

The fourth proportional to 427,215.96, 640,765.44 and 111,695.04 is: 167,527.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,215.96 : 640,765.44 = 111,695.04 : x
  2. Step 2: Convert to fraction form
    427,215.96/640,765.44 = 111,695.04/x
  3. Step 3: Cross multiply
    427,215.96x = 640,765.44 × 111,695.04
  4. Step 4: Simplify right side
    427,215.96x = 71,570,321,451.42
  5. Step 5: Solve for x
    x = 71,570,321,451.42/427,215.96
  6. Step 6: Final answer
    x = 167,527.27

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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.