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Finding the Fourth Proportional to 486,951.56, 672,420.66 and 305,977.04

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Solution

The fourth proportional to 486,951.56, 672,420.66 and 305,977.04 is: 422,516.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,951.56 : 672,420.66 = 305,977.04 : x
  2. Step 2: Convert to fraction form
    486,951.56/672,420.66 = 305,977.04/x
  3. Step 3: Cross multiply
    486,951.56x = 672,420.66 × 305,977.04
  4. Step 4: Simplify right side
    486,951.56x = 205,745,283,181.65
  5. Step 5: Solve for x
    x = 205,745,283,181.65/486,951.56
  6. Step 6: Final answer
    x = 422,516.94

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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.