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Finding the Fourth Proportional to 640,449.64, 960,778.86 and 197,217.64

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Solution

The fourth proportional to 640,449.64, 960,778.86 and 197,217.64 is: 295,858.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,449.64 : 960,778.86 = 197,217.64 : x
  2. Step 2: Convert to fraction form
    640,449.64/960,778.86 = 197,217.64/x
  3. Step 3: Cross multiply
    640,449.64x = 960,778.86 × 197,217.64
  4. Step 4: Simplify right side
    640,449.64x = 189,482,539,331.09
  5. Step 5: Solve for x
    x = 189,482,539,331.09/640,449.64
  6. Step 6: Final answer
    x = 295,858.61

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1.5x scale

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.