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Finding the Fourth Proportional to 425,489.35, 638,240.64 and 126,000.22

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Solution

The fourth proportional to 425,489.35, 638,240.64 and 126,000.22 is: 189,002.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,489.35 : 638,240.64 = 126,000.22 : x
  2. Step 2: Convert to fraction form
    425,489.35/638,240.64 = 126,000.22/x
  3. Step 3: Cross multiply
    425,489.35x = 638,240.64 × 126,000.22
  4. Step 4: Simplify right side
    425,489.35x = 80,418,461,052.94
  5. Step 5: Solve for x
    x = 80,418,461,052.94/425,489.35
  6. Step 6: Final answer
    x = 189,002.29

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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.