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Finding the Fourth Proportional to 511,810.20, 767,715.30 and 393,712.20

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Solution

The fourth proportional to 511,810.20, 767,715.30 and 393,712.20 is: 590,568.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,810.20 : 767,715.30 = 393,712.20 : x
  2. Step 2: Convert to fraction form
    511,810.20/767,715.30 = 393,712.20/x
  3. Step 3: Cross multiply
    511,810.20x = 767,715.30 × 393,712.20
  4. Step 4: Simplify right side
    511,810.20x = 302,258,879,736.66
  5. Step 5: Solve for x
    x = 302,258,879,736.66/511,810.20
  6. Step 6: Final answer
    x = 590,568.30

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Half scale
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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.