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Finding the Fourth Proportional to 482,356.72, 665,641.92 and 278,391.64

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Solution

The fourth proportional to 482,356.72, 665,641.92 and 278,391.64 is: 384,174.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,356.72 : 665,641.92 = 278,391.64 : x
  2. Step 2: Convert to fraction form
    482,356.72/665,641.92 = 278,391.64/x
  3. Step 3: Cross multiply
    482,356.72x = 665,641.92 × 278,391.64
  4. Step 4: Simplify right side
    482,356.72x = 185,309,145,761.55
  5. Step 5: Solve for x
    x = 185,309,145,761.55/482,356.72
  6. Step 6: Final answer
    x = 384,174.49

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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.