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Finding the Fourth Proportional to 521,544.97, 720,077.79 and 400,469.05

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Solution

The fourth proportional to 521,544.97, 720,077.79 and 400,469.05 is: 552,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,544.97 : 720,077.79 = 400,469.05 : x
  2. Step 2: Convert to fraction form
    521,544.97/720,077.79 = 400,469.05/x
  3. Step 3: Cross multiply
    521,544.97x = 720,077.79 × 400,469.05
  4. Step 4: Simplify right side
    521,544.97x = 288,368,868,487.40
  5. Step 5: Solve for x
    x = 288,368,868,487.40/521,544.97
  6. Step 6: Final answer
    x = 552,912.76

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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.