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Finding the Fourth Proportional to 354,138.11, 488,571.86 and 217,935.59

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Solution

The fourth proportional to 354,138.11, 488,571.86 and 217,935.59 is: 300,665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,138.11 : 488,571.86 = 217,935.59 : x
  2. Step 2: Convert to fraction form
    354,138.11/488,571.86 = 217,935.59/x
  3. Step 3: Cross multiply
    354,138.11x = 488,571.86 × 217,935.59
  4. Step 4: Simplify right side
    354,138.11x = 106,477,196,698.25
  5. Step 5: Solve for x
    x = 106,477,196,698.25/354,138.11
  6. Step 6: Final answer
    x = 300,665.74

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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.