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Finding the Fourth Proportional to 641,643.87, 885,563.46 and 369,660.03

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Solution

The fourth proportional to 641,643.87, 885,563.46 and 369,660.03 is: 510,185.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,643.87 : 885,563.46 = 369,660.03 : x
  2. Step 2: Convert to fraction form
    641,643.87/885,563.46 = 369,660.03/x
  3. Step 3: Cross multiply
    641,643.87x = 885,563.46 × 369,660.03
  4. Step 4: Simplify right side
    641,643.87x = 327,357,415,190.50
  5. Step 5: Solve for x
    x = 327,357,415,190.50/641,643.87
  6. Step 6: Final answer
    x = 510,185.53

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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.