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Finding the Fourth Proportional to 425,649.84, 638,568.72 and 126,154.32

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Solution

The fourth proportional to 425,649.84, 638,568.72 and 126,154.32 is: 189,259.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,649.84 : 638,568.72 = 126,154.32 : x
  2. Step 2: Convert to fraction form
    425,649.84/638,568.72 = 126,154.32/x
  3. Step 3: Cross multiply
    425,649.84x = 638,568.72 × 126,154.32
  4. Step 4: Simplify right side
    425,649.84x = 80,558,202,644.87
  5. Step 5: Solve for x
    x = 80,558,202,644.87/425,649.84
  6. Step 6: Final answer
    x = 189,259.33

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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.