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Finding the Fourth Proportional to 307,131.92, 423,648.06 and 211,472.48

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Solution

The fourth proportional to 307,131.92, 423,648.06 and 211,472.48 is: 291,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,131.92 : 423,648.06 = 211,472.48 : x
  2. Step 2: Convert to fraction form
    307,131.92/423,648.06 = 211,472.48/x
  3. Step 3: Cross multiply
    307,131.92x = 423,648.06 × 211,472.48
  4. Step 4: Simplify right side
    307,131.92x = 89,589,905,895.39
  5. Step 5: Solve for x
    x = 89,589,905,895.39/307,131.92
  6. Step 6: Final answer
    x = 291,698.45

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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.