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Finding the Fourth Proportional to 397,683.28, 548,072.76 and 372,430.72

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Solution

The fourth proportional to 397,683.28, 548,072.76 and 372,430.72 is: 513,270.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,683.28 : 548,072.76 = 372,430.72 : x
  2. Step 2: Convert to fraction form
    397,683.28/548,072.76 = 372,430.72/x
  3. Step 3: Cross multiply
    397,683.28x = 548,072.76 × 372,430.72
  4. Step 4: Simplify right side
    397,683.28x = 204,119,132,619.19
  5. Step 5: Solve for x
    x = 204,119,132,619.19/397,683.28
  6. Step 6: Final answer
    x = 513,270.59

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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.