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Finding the Fourth Proportional to 425,994.30, 638,881.98 and 126,403.98

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Solution

The fourth proportional to 425,994.30, 638,881.98 and 126,403.98 is: 189,573.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,994.30 : 638,881.98 = 126,403.98 : x
  2. Step 2: Convert to fraction form
    425,994.30/638,881.98 = 126,403.98/x
  3. Step 3: Cross multiply
    425,994.30x = 638,881.98 × 126,403.98
  4. Step 4: Simplify right side
    425,994.30x = 80,757,225,022.28
  5. Step 5: Solve for x
    x = 80,757,225,022.28/425,994.30
  6. Step 6: Final answer
    x = 189,573.49

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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.