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Finding the Fourth Proportional to 311,868.82, 430,379.22 and 168,628.96

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Solution

The fourth proportional to 311,868.82, 430,379.22 and 168,628.96 is: 232,708.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,868.82 : 430,379.22 = 168,628.96 : x
  2. Step 2: Convert to fraction form
    311,868.82/430,379.22 = 168,628.96/x
  3. Step 3: Cross multiply
    311,868.82x = 430,379.22 × 168,628.96
  4. Step 4: Simplify right side
    311,868.82x = 72,574,400,274.21
  5. Step 5: Solve for x
    x = 72,574,400,274.21/311,868.82
  6. Step 6: Final answer
    x = 232,708.10

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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.