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Finding the Fourth Proportional to 228,620.40, 315,492.74 and 126,645.56

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Solution

The fourth proportional to 228,620.40, 315,492.74 and 126,645.56 is: 174,768.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,620.40 : 315,492.74 = 126,645.56 : x
  2. Step 2: Convert to fraction form
    228,620.40/315,492.74 = 126,645.56/x
  3. Step 3: Cross multiply
    228,620.40x = 315,492.74 × 126,645.56
  4. Step 4: Simplify right side
    228,620.40x = 39,955,752,522.54
  5. Step 5: Solve for x
    x = 39,955,752,522.54/228,620.40
  6. Step 6: Final answer
    x = 174,768.97

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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.