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Finding the Fourth Proportional to 640,768.45, 884,250.73 and 350,380.94

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Solution

The fourth proportional to 640,768.45, 884,250.73 and 350,380.94 is: 483,520.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,768.45 : 884,250.73 = 350,380.94 : x
  2. Step 2: Convert to fraction form
    640,768.45/884,250.73 = 350,380.94/x
  3. Step 3: Cross multiply
    640,768.45x = 884,250.73 × 350,380.94
  4. Step 4: Simplify right side
    640,768.45x = 309,824,601,973.09
  5. Step 5: Solve for x
    x = 309,824,601,973.09/640,768.45
  6. Step 6: Final answer
    x = 483,520.38

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1.5x scale

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.