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Finding the Fourth Proportional to 386,771.53, 580,156.50 and 218,215.34

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Solution

The fourth proportional to 386,771.53, 580,156.50 and 218,215.34 is: 327,322.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,771.53 : 580,156.50 = 218,215.34 : x
  2. Step 2: Convert to fraction form
    386,771.53/580,156.50 = 218,215.34/x
  3. Step 3: Cross multiply
    386,771.53x = 580,156.50 × 218,215.34
  4. Step 4: Simplify right side
    386,771.53x = 126,599,046,357.21
  5. Step 5: Solve for x
    x = 126,599,046,357.21/386,771.53
  6. Step 6: Final answer
    x = 327,322.56

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1.5x scale

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.