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Finding the Fourth Proportional to 543,688.56, 815,568.38 and 144,318.67

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Solution

The fourth proportional to 543,688.56, 815,568.38 and 144,318.67 is: 216,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,688.56 : 815,568.38 = 144,318.67 : x
  2. Step 2: Convert to fraction form
    543,688.56/815,568.38 = 144,318.67/x
  3. Step 3: Cross multiply
    543,688.56x = 815,568.38 × 144,318.67
  4. Step 4: Simplify right side
    543,688.56x = 117,701,741,676.34
  5. Step 5: Solve for x
    x = 117,701,741,676.34/543,688.56
  6. Step 6: Final answer
    x = 216,487.43

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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.