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Finding the Fourth Proportional to 400,968.74, 553,336.85 and 219,687.55

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Solution

The fourth proportional to 400,968.74, 553,336.85 and 219,687.55 is: 303,168.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,968.74 : 553,336.85 = 219,687.55 : x
  2. Step 2: Convert to fraction form
    400,968.74/553,336.85 = 219,687.55/x
  3. Step 3: Cross multiply
    400,968.74x = 553,336.85 × 219,687.55
  4. Step 4: Simplify right side
    400,968.74x = 121,561,216,067.09
  5. Step 5: Solve for x
    x = 121,561,216,067.09/400,968.74
  6. Step 6: Final answer
    x = 303,168.81

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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.