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Finding the Fourth Proportional to 640,625.25, 961,517.43 and 341,358.60

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Solution

The fourth proportional to 640,625.25, 961,517.43 and 341,358.60 is: 512,346.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,625.25 : 961,517.43 = 341,358.60 : x
  2. Step 2: Convert to fraction form
    640,625.25/961,517.43 = 341,358.60/x
  3. Step 3: Cross multiply
    640,625.25x = 961,517.43 × 341,358.60
  4. Step 4: Simplify right side
    640,625.25x = 328,222,243,780.40
  5. Step 5: Solve for x
    x = 328,222,243,780.40/640,625.25
  6. Step 6: Final answer
    x = 512,346.72

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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.