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Finding the Fourth Proportional to 640,265.28, 959,630.70 and 298,247.64

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Solution

The fourth proportional to 640,265.28, 959,630.70 and 298,247.64 is: 447,014.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,265.28 : 959,630.70 = 298,247.64 : x
  2. Step 2: Convert to fraction form
    640,265.28/959,630.70 = 298,247.64/x
  3. Step 3: Cross multiply
    640,265.28x = 959,630.70 × 298,247.64
  4. Step 4: Simplify right side
    640,265.28x = 286,207,591,546.55
  5. Step 5: Solve for x
    x = 286,207,591,546.55/640,265.28
  6. Step 6: Final answer
    x = 447,014.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.