Home / 387,149.18-534,172.39-225,912.20

Finding the Fourth Proportional to 387,149.18, 534,172.39 and 225,912.20

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Solution

The fourth proportional to 387,149.18, 534,172.39 and 225,912.20 is: 311,704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,149.18 : 534,172.39 = 225,912.20 : x
  2. Step 2: Convert to fraction form
    387,149.18/534,172.39 = 225,912.20/x
  3. Step 3: Cross multiply
    387,149.18x = 534,172.39 × 225,912.20
  4. Step 4: Simplify right side
    387,149.18x = 120,676,056,568.52
  5. Step 5: Solve for x
    x = 120,676,056,568.52/387,149.18
  6. Step 6: Final answer
    x = 311,704.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.