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Finding the Fourth Proportional to 427,226.80, 640,840.20 and 111,715.60

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Solution

The fourth proportional to 427,226.80, 640,840.20 and 111,715.60 is: 167,573.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,226.80 : 640,840.20 = 111,715.60 : x
  2. Step 2: Convert to fraction form
    427,226.80/640,840.20 = 111,715.60/x
  3. Step 3: Cross multiply
    427,226.80x = 640,840.20 × 111,715.60
  4. Step 4: Simplify right side
    427,226.80x = 71,591,847,447.12
  5. Step 5: Solve for x
    x = 71,591,847,447.12/427,226.80
  6. Step 6: Final answer
    x = 167,573.40

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1.5x scale

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.