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Finding the Fourth Proportional to 400,912.97, 553,260.56 and 219,620.93

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Solution

The fourth proportional to 400,912.97, 553,260.56 and 219,620.93 is: 303,077.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,912.97 : 553,260.56 = 219,620.93 : x
  2. Step 2: Convert to fraction form
    400,912.97/553,260.56 = 219,620.93/x
  3. Step 3: Cross multiply
    400,912.97x = 553,260.56 × 219,620.93
  4. Step 4: Simplify right side
    400,912.97x = 121,507,594,855.11
  5. Step 5: Solve for x
    x = 121,507,594,855.11/400,912.97
  6. Step 6: Final answer
    x = 303,077.24

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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.