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Finding the Fourth Proportional to 640,578.88, 884,004.15 and 354,103.75

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Solution

The fourth proportional to 640,578.88, 884,004.15 and 354,103.75 is: 488,666.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,578.88 : 884,004.15 = 354,103.75 : x
  2. Step 2: Convert to fraction form
    640,578.88/884,004.15 = 354,103.75/x
  3. Step 3: Cross multiply
    640,578.88x = 884,004.15 × 354,103.75
  4. Step 4: Simplify right side
    640,578.88x = 313,029,184,530.56
  5. Step 5: Solve for x
    x = 313,029,184,530.56/640,578.88
  6. Step 6: Final answer
    x = 488,666.10

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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.