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Finding the Fourth Proportional to 427,240.80, 640,805.58 and 111,722.04

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Solution

The fourth proportional to 427,240.80, 640,805.58 and 111,722.04 is: 167,568.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,240.80 : 640,805.58 = 111,722.04 : x
  2. Step 2: Convert to fraction form
    427,240.80/640,805.58 = 111,722.04/x
  3. Step 3: Cross multiply
    427,240.80x = 640,805.58 × 111,722.04
  4. Step 4: Simplify right side
    427,240.80x = 71,592,106,640.98
  5. Step 5: Solve for x
    x = 71,592,106,640.98/427,240.80
  6. Step 6: Final answer
    x = 167,568.52

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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.