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Finding the Fourth Proportional to 640,501.11, 960,768.67 and 280,485.98

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Solution

The fourth proportional to 640,501.11, 960,768.67 and 280,485.98 is: 420,736.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,501.11 : 960,768.67 = 280,485.98 : x
  2. Step 2: Convert to fraction form
    640,501.11/960,768.67 = 280,485.98/x
  3. Step 3: Cross multiply
    640,501.11x = 960,768.67 × 280,485.98
  4. Step 4: Simplify right side
    640,501.11x = 269,482,141,958.25
  5. Step 5: Solve for x
    x = 269,482,141,958.25/640,501.11
  6. Step 6: Final answer
    x = 420,736.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.