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Finding the Fourth Proportional to 427,247.80, 640,816.08 and 111,729.04

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Solution

The fourth proportional to 427,247.80, 640,816.08 and 111,729.04 is: 167,579.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,247.80 : 640,816.08 = 111,729.04 : x
  2. Step 2: Convert to fraction form
    427,247.80/640,816.08 = 111,729.04/x
  3. Step 3: Cross multiply
    427,247.80x = 640,816.08 × 111,729.04
  4. Step 4: Simplify right side
    427,247.80x = 71,597,765,434.96
  5. Step 5: Solve for x
    x = 71,597,765,434.96/427,247.80
  6. Step 6: Final answer
    x = 167,579.01

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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.