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Finding the Fourth Proportional to 418,556.12, 623,891.25 and 384,963.80

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Solution

The fourth proportional to 418,556.12, 623,891.25 and 384,963.80 is: 573,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,556.12 : 623,891.25 = 384,963.80 : x
  2. Step 2: Convert to fraction form
    418,556.12/623,891.25 = 384,963.80/x
  3. Step 3: Cross multiply
    418,556.12x = 623,891.25 × 384,963.80
  4. Step 4: Simplify right side
    418,556.12x = 240,175,546,386.75
  5. Step 5: Solve for x
    x = 240,175,546,386.75/418,556.12
  6. Step 6: Final answer
    x = 573,819.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.