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Finding the Fourth Proportional to 431,939.96, 648,106.86 and 221,725.64

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Solution

The fourth proportional to 431,939.96, 648,106.86 and 221,725.64 is: 332,689.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,939.96 : 648,106.86 = 221,725.64 : x
  2. Step 2: Convert to fraction form
    431,939.96/648,106.86 = 221,725.64/x
  3. Step 3: Cross multiply
    431,939.96x = 648,106.86 × 221,725.64
  4. Step 4: Simplify right side
    431,939.96x = 143,701,908,321.89
  5. Step 5: Solve for x
    x = 143,701,908,321.89/431,939.96
  6. Step 6: Final answer
    x = 332,689.54

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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.