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Finding the Fourth Proportional to 501,191.74, 690,975.42 and 398,167.72

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Solution

The fourth proportional to 501,191.74, 690,975.42 and 398,167.72 is: 548,939.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,191.74 : 690,975.42 = 398,167.72 : x
  2. Step 2: Convert to fraction form
    501,191.74/690,975.42 = 398,167.72/x
  3. Step 3: Cross multiply
    501,191.74x = 690,975.42 × 398,167.72
  4. Step 4: Simplify right side
    501,191.74x = 275,124,107,557.44
  5. Step 5: Solve for x
    x = 275,124,107,557.44/501,191.74
  6. Step 6: Final answer
    x = 548,939.83

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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.