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Finding the Fourth Proportional to 307,128.92, 423,643.92 and 211,469.48

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Solution

The fourth proportional to 307,128.92, 423,643.92 and 211,469.48 is: 291,694.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,128.92 : 423,643.92 = 211,469.48 : x
  2. Step 2: Convert to fraction form
    307,128.92/423,643.92 = 211,469.48/x
  3. Step 3: Cross multiply
    307,128.92x = 423,643.92 × 211,469.48
  4. Step 4: Simplify right side
    307,128.92x = 89,587,759,467.56
  5. Step 5: Solve for x
    x = 89,587,759,467.56/307,128.92
  6. Step 6: Final answer
    x = 291,694.31

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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.