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Finding the Fourth Proportional to 640,449.92, 961,276.80 and 325,133.12

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Solution

The fourth proportional to 640,449.92, 961,276.80 and 325,133.12 is: 488,005.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,449.92 : 961,276.80 = 325,133.12 : x
  2. Step 2: Convert to fraction form
    640,449.92/961,276.80 = 325,133.12/x
  3. Step 3: Cross multiply
    640,449.92x = 961,276.80 × 325,133.12
  4. Step 4: Simplify right side
    640,449.92x = 312,542,925,167.62
  5. Step 5: Solve for x
    x = 312,542,925,167.62/640,449.92
  6. Step 6: Final answer
    x = 488,005.25

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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.