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Finding the Fourth Proportional to 427,265.56, 640,900.50 and 111,723.16

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Solution

The fourth proportional to 427,265.56, 640,900.50 and 111,723.16 is: 167,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,265.56 : 640,900.50 = 111,723.16 : x
  2. Step 2: Convert to fraction form
    427,265.56/640,900.50 = 111,723.16/x
  3. Step 3: Cross multiply
    427,265.56x = 640,900.50 × 111,723.16
  4. Step 4: Simplify right side
    427,265.56x = 71,603,429,105.58
  5. Step 5: Solve for x
    x = 71,603,429,105.58/427,265.56
  6. Step 6: Final answer
    x = 167,585.30

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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.