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Finding the Fourth Proportional to 385,555.46, 578,318.76 and 101,243.42

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Solution

The fourth proportional to 385,555.46, 578,318.76 and 101,243.42 is: 151,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,555.46 : 578,318.76 = 101,243.42 : x
  2. Step 2: Convert to fraction form
    385,555.46/578,318.76 = 101,243.42/x
  3. Step 3: Cross multiply
    385,555.46x = 578,318.76 × 101,243.42
  4. Step 4: Simplify right side
    385,555.46x = 58,550,969,112.56
  5. Step 5: Solve for x
    x = 58,550,969,112.56/385,555.46
  6. Step 6: Final answer
    x = 151,861.34

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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.