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Finding the Fourth Proportional to 418,940.80, 628,411.20 and 325,513.60

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Solution

The fourth proportional to 418,940.80, 628,411.20 and 325,513.60 is: 488,270.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,940.80 : 628,411.20 = 325,513.60 : x
  2. Step 2: Convert to fraction form
    418,940.80/628,411.20 = 325,513.60/x
  3. Step 3: Cross multiply
    418,940.80x = 628,411.20 × 325,513.60
  4. Step 4: Simplify right side
    418,940.80x = 204,556,391,992.32
  5. Step 5: Solve for x
    x = 204,556,391,992.32/418,940.80
  6. Step 6: Final answer
    x = 488,270.40

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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.