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Finding the Fourth Proportional to 640,579.38, 884,004.84 and 354,104.25

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Solution

The fourth proportional to 640,579.38, 884,004.84 and 354,104.25 is: 488,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,579.38 : 884,004.84 = 354,104.25 : x
  2. Step 2: Convert to fraction form
    640,579.38/884,004.84 = 354,104.25/x
  3. Step 3: Cross multiply
    640,579.38x = 884,004.84 × 354,104.25
  4. Step 4: Simplify right side
    640,579.38x = 313,029,870,864.57
  5. Step 5: Solve for x
    x = 313,029,870,864.57/640,579.38
  6. Step 6: Final answer
    x = 488,666.79

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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.