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Finding the Fourth Proportional to 451,584.55, 622,721.45 and 315,568.64

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Solution

The fourth proportional to 451,584.55, 622,721.45 and 315,568.64 is: 435,159.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,584.55 : 622,721.45 = 315,568.64 : x
  2. Step 2: Convert to fraction form
    451,584.55/622,721.45 = 315,568.64/x
  3. Step 3: Cross multiply
    451,584.55x = 622,721.45 × 315,568.64
  4. Step 4: Simplify right side
    451,584.55x = 196,511,363,421.05
  5. Step 5: Solve for x
    x = 196,511,363,421.05/451,584.55
  6. Step 6: Final answer
    x = 435,159.62

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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.