Home / 669,991.40-1,004,987.10-386,556.20

Finding the Fourth Proportional to 669,991.40, 1,004,987.10 and 386,556.20

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Solution

The fourth proportional to 669,991.40, 1,004,987.10 and 386,556.20 is: 579,834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,991.40 : 1,004,987.10 = 386,556.20 : x
  2. Step 2: Convert to fraction form
    669,991.40/1,004,987.10 = 386,556.20/x
  3. Step 3: Cross multiply
    669,991.40x = 1,004,987.10 × 386,556.20
  4. Step 4: Simplify right side
    669,991.40x = 388,483,994,425.02
  5. Step 5: Solve for x
    x = 388,483,994,425.02/669,991.40
  6. Step 6: Final answer
    x = 579,834.30

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Double scale
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Similar ratio
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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.