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Finding the Fourth Proportional to 458,340.74, 687,529.75 and 218,331.26

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Solution

The fourth proportional to 458,340.74, 687,529.75 and 218,331.26 is: 327,505.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,340.74 : 687,529.75 = 218,331.26 : x
  2. Step 2: Convert to fraction form
    458,340.74/687,529.75 = 218,331.26/x
  3. Step 3: Cross multiply
    458,340.74x = 687,529.75 × 218,331.26
  4. Step 4: Simplify right side
    458,340.74x = 150,109,236,604.99
  5. Step 5: Solve for x
    x = 150,109,236,604.99/458,340.74
  6. Step 6: Final answer
    x = 327,505.77

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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.