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Finding the Fourth Proportional to 640,577.88, 884,002.77 and 354,102.75

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Solution

The fourth proportional to 640,577.88, 884,002.77 and 354,102.75 is: 488,664.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,577.88 : 884,002.77 = 354,102.75 : x
  2. Step 2: Convert to fraction form
    640,577.88/884,002.77 = 354,102.75/x
  3. Step 3: Cross multiply
    640,577.88x = 884,002.77 × 354,102.75
  4. Step 4: Simplify right side
    640,577.88x = 313,027,811,864.62
  5. Step 5: Solve for x
    x = 313,027,811,864.62/640,577.88
  6. Step 6: Final answer
    x = 488,664.72

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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.