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Finding the Fourth Proportional to 640,660.34, 884,066.87 and 354,157.88

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Solution

The fourth proportional to 640,660.34, 884,066.87 and 354,157.88 is: 488,713.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,660.34 : 884,066.87 = 354,157.88 : x
  2. Step 2: Convert to fraction form
    640,660.34/884,066.87 = 354,157.88/x
  3. Step 3: Cross multiply
    640,660.34x = 884,066.87 × 354,157.88
  4. Step 4: Simplify right side
    640,660.34x = 313,099,244,922.50
  5. Step 5: Solve for x
    x = 313,099,244,922.50/640,660.34
  6. Step 6: Final answer
    x = 488,713.32

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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.