Home / 427,999.26-641,997.38-128,478.62

Finding the Fourth Proportional to 427,999.26, 641,997.38 and 128,478.62

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Solution

The fourth proportional to 427,999.26, 641,997.38 and 128,478.62 is: 192,717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,999.26 : 641,997.38 = 128,478.62 : x
  2. Step 2: Convert to fraction form
    427,999.26/641,997.38 = 128,478.62/x
  3. Step 3: Cross multiply
    427,999.26x = 641,997.38 × 128,478.62
  4. Step 4: Simplify right side
    427,999.26x = 82,482,937,426.02
  5. Step 5: Solve for x
    x = 82,482,937,426.02/427,999.26
  6. Step 6: Final answer
    x = 192,717.48

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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.